diff --git a/index.html b/index.html
index b3f6cb5..e80982b 100644
--- a/index.html
+++ b/index.html
@@ -1420,7 +1420,7 @@
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@@ -2693,7 +2693,7 @@
 </ul></div><div id="menu-toggle"><svg xmlns="http://www.w3.org/2000/svg" style="width:100%; height:100%; stroke:currentColor" viewBox="0 0 120 120">
       <title>Menu</title>
       <path stroke-width="10" stroke-linecap="round" d="M30,60 h60  M30,30 m0,5 h60  M30,90 m0,-5 h60"></path>
-    </svg></div><div id="menu-spacer" class="menu-spacer"></div><div id="menu"><div id="menu-search"><input type="text" id="menu-search-box" placeholder="Search..."><div id="menu-search-results" class="inactive"></div></div><div id="menu-pins"><div class="menu-pane-header">Pins</div><ul id="menu-pins-list"></ul></div><div class="menu-pane-header">Table of Contents</div><div id="menu-toc"><ol class="toc"><li><span class="item-toggle">◢</span><a href="#durationformat-objects" title="DurationFormat Objects"><span class="secnum">1</span> DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-intl-durationformat-abstracts" title="Abstract Operations for DurationFormat Objects"><span class="secnum">1.1</span> Abstract Operations for DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-duration-records" title="Duration Records"><span class="secnum">1.1.1</span> Duration Records</a></li><li><span class="item-toggle-none"></span><a href="#sec-tointegerwithoutrounding" title="ToIntegerIfIntegral ( argument )"><span class="secnum">1.1.2</span> ToIntegerIfIntegral ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-todurationrecord" title="ToDurationRecord ( input )"><span class="secnum">1.1.3</span> ToDurationRecord ( <var>input</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-durationrecordsign" title="DurationRecordSign ( record )"><span class="secnum">1.1.4</span> DurationRecordSign ( <var>record</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isvaliddurationrecord" title="IsValidDurationRecord ( record )"><span class="secnum">1.1.5</span> IsValidDurationRecord ( <var>record</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getdurationunitoptions" title="GetDurationUnitOptions ( unit, options, baseStyle, stylesList, digitalBase, prevStyle )"><span class="secnum">1.1.6</span> GetDurationUnitOptions ( <var>unit</var>, <var>options</var>, <var>baseStyle</var>, <var>stylesList</var>, <var>digitalBase</var>, <var>prevStyle</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-addfractionaldigits" title="AddFractionalDigits ( durationFormat, duration )"><span class="secnum">1.1.7</span> AddFractionalDigits ( <var>durationFormat</var>, <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-partitiondurationformatpattern" title="PartitionDurationFormatPattern ( durationFormat, duration )"><span class="secnum">1.1.8</span> PartitionDurationFormatPattern ( <var>durationFormat</var>, <var>duration</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-intl-durationformat-constructor" title="The Intl.DurationFormat Constructor"><span class="secnum">1.2</span> The Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat" title="Intl.DurationFormat ( [ locales [ , options ] ] )"><span class="secnum">1.2.1</span> Intl.DurationFormat ( [ <var>locales</var> [ , <var>options</var> ] ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-intl-durationformat-constructor" title="Properties of the Intl.DurationFormat Constructor"><span class="secnum">1.3</span> Properties of the Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype" title="Intl.DurationFormat.prototype"><span class="secnum">1.3.1</span> Intl.DurationFormat.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.supportedLocalesOf" title="Intl.DurationFormat.supportedLocalesOf ( locales [ , options ] )"><span class="secnum">1.3.2</span> Intl.DurationFormat.supportedLocalesOf ( <var>locales</var> [ , <var>options</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat-internal-slots" title="Internal slots"><span class="secnum">1.3.3</span> Internal slots</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-intl-durationformat-prototype-object" title="Properties of the Intl.DurationFormat Prototype Object"><span class="secnum">1.4</span> Properties of the Intl.DurationFormat Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.constructor" title="Intl.DurationFormat.prototype.constructor"><span class="secnum">1.4.1</span> Intl.DurationFormat.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype-@@tostringtag" title="Intl.DurationFormat.prototype [ @@toStringTag ]"><span class="secnum">1.4.2</span> Intl.DurationFormat.prototype [ @@toStringTag ]</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.format" title="Intl.DurationFormat.prototype.format ( duration )"><span class="secnum">1.4.3</span> Intl.DurationFormat.prototype.format ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.formatToParts" title="Intl.DurationFormat.prototype.formatToParts ( duration )"><span class="secnum">1.4.4</span> Intl.DurationFormat.prototype.formatToParts ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.resolvedOptions" title="Intl.DurationFormat.prototype.resolvedOptions ( )"><span class="secnum">1.4.5</span> Intl.DurationFormat.prototype.resolvedOptions ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-intl-durationformat-instances" title="Properties of Intl.DurationFormat Instances"><span class="secnum">1.5</span> Properties of Intl.DurationFormat Instances</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-copyright-and-software-license" title="Copyright &amp; Software License"><span class="secnum">A</span> Copyright &amp; Software License</a></li></ol></div></div><div id="spec-container"><h1 class="version">Stage 3 Draft / May 6, 2024</h1><h1 class="title">Intl.DurationFormat</h1>
+    </svg></div><div id="menu-spacer" class="menu-spacer"></div><div id="menu"><div id="menu-search"><input type="text" id="menu-search-box" placeholder="Search..."><div id="menu-search-results" class="inactive"></div></div><div id="menu-pins"><div class="menu-pane-header">Pins</div><ul id="menu-pins-list"></ul></div><div class="menu-pane-header">Table of Contents</div><div id="menu-toc"><ol class="toc"><li><span class="item-toggle">◢</span><a href="#durationformat-objects" title="DurationFormat Objects"><span class="secnum">1</span> DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle">◢</span><a href="#sec-intl-durationformat-abstracts" title="Abstract Operations for DurationFormat Objects"><span class="secnum">1.1</span> Abstract Operations for DurationFormat Objects</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-duration-records" title="Duration Records"><span class="secnum">1.1.1</span> Duration Records</a></li><li><span class="item-toggle-none"></span><a href="#sec-tointegerwithoutrounding" title="ToIntegerIfIntegral ( argument )"><span class="secnum">1.1.2</span> ToIntegerIfIntegral ( <var>argument</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-todurationrecord" title="ToDurationRecord ( input )"><span class="secnum">1.1.3</span> ToDurationRecord ( <var>input</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-durationrecordsign" title="DurationRecordSign ( record )"><span class="secnum">1.1.4</span> DurationRecordSign ( <var>record</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-isvaliddurationrecord" title="IsValidDurationRecord ( record )"><span class="secnum">1.1.5</span> IsValidDurationRecord ( <var>record</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-getdurationunitoptions" title="GetDurationUnitOptions ( unit, options, baseStyle, stylesList, digitalBase, prevStyle, twoDigitHours )"><span class="secnum">1.1.6</span> GetDurationUnitOptions ( <var>unit</var>, <var>options</var>, <var>baseStyle</var>, <var>stylesList</var>, <var>digitalBase</var>, <var>prevStyle</var>, <var>twoDigitHours</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-addfractionaldigits" title="AddFractionalDigits ( durationFormat, duration )"><span class="secnum">1.1.7</span> AddFractionalDigits ( <var>durationFormat</var>, <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-nextunitfractional" title="NextUnitFractional ( durationFormat, unit )"><span class="secnum">1.1.8</span> NextUnitFractional ( <var>durationFormat</var>, <var>unit</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumerichours" title="FormatNumericHours ( durationFormat, hoursValue, signDisplayed )"><span class="secnum">1.1.9</span> FormatNumericHours ( <var>durationFormat</var>, <var>hoursValue</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericminutes" title="FormatNumericMinutes ( durationFormat, minutesValue, hoursDisplayed, signDisplayed )"><span class="secnum">1.1.10</span> FormatNumericMinutes ( <var>durationFormat</var>, <var>minutesValue</var>, <var>hoursDisplayed</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericseconds" title="FormatNumericSeconds ( durationFormat, secondsValue, minutesDisplayed, signDisplayed )"><span class="secnum">1.1.11</span> FormatNumericSeconds ( <var>durationFormat</var>, <var>secondsValue</var>, <var>minutesDisplayed</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-formatnumericunits" title="FormatNumericUnits ( durationFormat, duration, firstNumericUnit, signDisplayed )"><span class="secnum">1.1.12</span> FormatNumericUnits ( <var>durationFormat</var>, <var>duration</var>, <var>firstNumericUnit</var>, <var>signDisplayed</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-listformatparts" title="ListFormatParts ( durationFormat, partitionedPartsList )"><span class="secnum">1.1.13</span> ListFormatParts ( <var>durationFormat</var>, <var>partitionedPartsList</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-partitiondurationformatpattern" title="PartitionDurationFormatPattern ( durationFormat, duration )"><span class="secnum">1.1.14</span> PartitionDurationFormatPattern ( <var>durationFormat</var>, <var>duration</var> )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-intl-durationformat-constructor" title="The Intl.DurationFormat Constructor"><span class="secnum">1.2</span> The Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat" title="Intl.DurationFormat ( [ locales [ , options ] ] )"><span class="secnum">1.2.1</span> Intl.DurationFormat ( [ <var>locales</var> [ , <var>options</var> ] ] )</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-intl-durationformat-constructor" title="Properties of the Intl.DurationFormat Constructor"><span class="secnum">1.3</span> Properties of the Intl.DurationFormat Constructor</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype" title="Intl.DurationFormat.prototype"><span class="secnum">1.3.1</span> Intl.DurationFormat.prototype</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.supportedLocalesOf" title="Intl.DurationFormat.supportedLocalesOf ( locales [ , options ] )"><span class="secnum">1.3.2</span> Intl.DurationFormat.supportedLocalesOf ( <var>locales</var> [ , <var>options</var> ] )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat-internal-slots" title="Internal slots"><span class="secnum">1.3.3</span> Internal slots</a></li></ol></li><li><span class="item-toggle">◢</span><a href="#sec-properties-of-intl-durationformat-prototype-object" title="Properties of the Intl.DurationFormat Prototype Object"><span class="secnum">1.4</span> Properties of the Intl.DurationFormat Prototype Object</a><ol class="toc"><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.constructor" title="Intl.DurationFormat.prototype.constructor"><span class="secnum">1.4.1</span> Intl.DurationFormat.prototype.constructor</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype-@@tostringtag" title="Intl.DurationFormat.prototype [ @@toStringTag ]"><span class="secnum">1.4.2</span> Intl.DurationFormat.prototype [ @@toStringTag ]</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.format" title="Intl.DurationFormat.prototype.format ( duration )"><span class="secnum">1.4.3</span> Intl.DurationFormat.prototype.format ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.formatToParts" title="Intl.DurationFormat.prototype.formatToParts ( duration )"><span class="secnum">1.4.4</span> Intl.DurationFormat.prototype.formatToParts ( <var>duration</var> )</a></li><li><span class="item-toggle-none"></span><a href="#sec-Intl.DurationFormat.prototype.resolvedOptions" title="Intl.DurationFormat.prototype.resolvedOptions ( )"><span class="secnum">1.4.5</span> Intl.DurationFormat.prototype.resolvedOptions ( )</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-properties-of-intl-durationformat-instances" title="Properties of Intl.DurationFormat Instances"><span class="secnum">1.5</span> Properties of Intl.DurationFormat Instances</a></li></ol></li><li><span class="item-toggle-none"></span><a href="#sec-copyright-and-software-license" title="Copyright &amp; Software License"><span class="secnum">A</span> Copyright &amp; Software License</a></li></ol></div></div><div id="spec-container"><h1 class="version">Stage 3 Draft / May 20, 2024</h1><h1 class="title">Intl.DurationFormat</h1>
 <emu-biblio href="./biblio.json"></emu-biblio>
 <emu-clause id="durationformat-objects">
   <h1><span class="secnum">1</span> DurationFormat Objects</h1>
@@ -2801,10 +2801,10 @@ <h1><span class="secnum">1.1.5</span> IsValidDurationRecord ( <var>record</var>
     </emu-clause>
 
     <emu-clause id="sec-getdurationunitoptions" type="abstract operation" aoid="GetDurationUnitOptions">
-      <h1><span class="secnum">1.1.6</span> GetDurationUnitOptions ( <var>unit</var>, <var>options</var>, <var>baseStyle</var>, <var>stylesList</var>, <var>digitalBase</var>, <var>prevStyle</var> )</h1>
-      <p>The abstract operation GetDurationUnitOptions takes arguments <var>unit</var> (a String), <var>options</var> (an Object), <var>baseStyle</var> (a String), <var>stylesList</var> (a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of Strings), <var>digitalBase</var> (a String), and <var>prevStyle</var> (a String) and returns either a <emu-xref href="#sec-completion-record-specification-type"><a href="https://tc39.es/ecma262/#sec-completion-record-specification-type">normal completion containing</a></emu-xref> a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> with <var class="field">[[Style]]</var> and <var class="field">[[Display]]</var> fields, or an <emu-xref href="#sec-completion-record-specification-type"><a href="https://tc39.es/ecma262/#sec-completion-record-specification-type">abrupt completion</a></emu-xref>. It extracts the relevant options for any given <var>unit</var> from an Object and returns them as a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref>. It performs the following steps when called:</p>
+      <h1><span class="secnum">1.1.6</span> GetDurationUnitOptions ( <var>unit</var>, <var>options</var>, <var>baseStyle</var>, <var>stylesList</var>, <var>digitalBase</var>, <var>prevStyle</var>, <var>twoDigitHours</var> )</h1>
+      <p>The abstract operation GetDurationUnitOptions takes arguments <var>unit</var> (a String), <var>options</var> (an Object), <var>baseStyle</var> (a String), <var>stylesList</var> (a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of Strings), <var>digitalBase</var> (a String), <var>prevStyle</var> (a String), and <var>twoDigitHours</var> (a Boolean) and returns either a <emu-xref href="#sec-completion-record-specification-type"><a href="https://tc39.es/ecma262/#sec-completion-record-specification-type">normal completion containing</a></emu-xref> a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> with <var class="field">[[Style]]</var> and <var class="field">[[Display]]</var> fields, or an <emu-xref href="#sec-completion-record-specification-type"><a href="https://tc39.es/ecma262/#sec-completion-record-specification-type">abrupt completion</a></emu-xref>. It extracts the relevant options for any given <var>unit</var> from an Object and returns them as a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref>. It performs the following steps when called:</p>
 
-      <emu-alg><ol><li>Let <var>style</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <var>unit</var>, <emu-const>string</emu-const>, <var>stylesList</var>, <emu-val>undefined</emu-val>).</li><li>Let <var>displayDefault</var> be <emu-val>"always"</emu-val>.</li><li>If <var>style</var> is <emu-val>undefined</emu-val>, then<ol><li>If <var>baseStyle</var> is <emu-val>"digital"</emu-val>, then<ol><li>If <var>unit</var> is not one of <emu-val>"hours"</emu-val>, <emu-val>"minutes"</emu-val>, or <emu-val>"seconds"</emu-val>, then<ol><li>Set <var>displayDefault</var> to <emu-val>"auto"</emu-val>.</li></ol></li><li>Set <var>style</var> to <var>digitalBase</var>.</li></ol></li><li>Else,<ol><li>If <var>prevStyle</var> is <emu-val>"fractional"</emu-val>, <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val>, then<ol><li>If <var>unit</var> is not one of <emu-val>"minutes"</emu-val> or <emu-val>"seconds"</emu-val>, then<ol><li>Set <var>displayDefault</var> to <emu-val>"auto"</emu-val>.</li></ol></li><li>Set <var>style</var> to <emu-val>"numeric"</emu-val>.</li></ol></li><li>Else,<ol><li>Set <var>displayDefault</var> to <emu-val>"auto"</emu-val>.</li><li>Set <var>style</var> to <var>baseStyle</var>.</li></ol></li></ol></li></ol></li><li>If <var>style</var> is <emu-val>"numeric"</emu-val>, then<ol><li>If <var>unit</var> is one of <emu-val>"milliseconds"</emu-val>, <emu-val>"microseconds"</emu-val>, or <emu-val>"nanoseconds"</emu-val>, then<ol><li>Set <var>style</var> to <emu-val>"fractional"</emu-val>.</li><li>Set <var>displayDefault</var> to <emu-val>"auto"</emu-val>.</li></ol></li></ol></li><li>Let <var>displayField</var> be the <emu-xref href="#string-concatenation"><a href="https://tc39.es/ecma262/#string-concatenation">string-concatenation</a></emu-xref> of <var>unit</var> and <emu-val>"Display"</emu-val>.</li><li>Let <var>display</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <var>displayField</var>, <emu-const>string</emu-const>, « <emu-val>"auto"</emu-val>, <emu-val>"always"</emu-val> », <var>displayDefault</var>).</li><li>If <var>display</var> is <emu-val>"always"</emu-val> and <var>style</var> is <emu-val>"fractional"</emu-val>, then<ol><li>Throw a <emu-val>RangeError</emu-val> exception.</li></ol></li><li>If <var>prevStyle</var> is <emu-val>"fractional"</emu-val>, then<ol><li>If <var>style</var> is not <emu-val>"fractional"</emu-val>, then<ol><li>Throw a <emu-val>RangeError</emu-val> exception.</li></ol></li></ol></li><li>If <var>prevStyle</var> is <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val>, then<ol><li>If <var>style</var> is not <emu-val>"fractional"</emu-val>, <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val>, then<ol><li>Throw a <emu-val>RangeError</emu-val> exception.</li></ol></li><li>If <var>unit</var> is <emu-val>"minutes"</emu-val> or <emu-val>"seconds"</emu-val>, then<ol><li>Set <var>style</var> to <emu-val>"2-digit"</emu-val>.</li></ol></li></ol></li><li>Return the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> {
+      <emu-alg><ol><li>Let <var>style</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <var>unit</var>, <emu-const>string</emu-const>, <var>stylesList</var>, <emu-val>undefined</emu-val>).</li><li>Let <var>displayDefault</var> be <emu-val>"always"</emu-val>.</li><li>If <var>style</var> is <emu-val>undefined</emu-val>, then<ol><li>If <var>baseStyle</var> is <emu-val>"digital"</emu-val>, then<ol><li>If <var>unit</var> is not one of <emu-val>"hours"</emu-val>, <emu-val>"minutes"</emu-val>, or <emu-val>"seconds"</emu-val>, then<ol><li>Set <var>displayDefault</var> to <emu-val>"auto"</emu-val>.</li></ol></li><li>Set <var>style</var> to <var>digitalBase</var>.</li></ol></li><li>Else,<ol><li>If <var>prevStyle</var> is <emu-val>"fractional"</emu-val>, <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val>, then<ol><li>If <var>unit</var> is not one of <emu-val>"minutes"</emu-val> or <emu-val>"seconds"</emu-val>, then<ol><li>Set <var>displayDefault</var> to <emu-val>"auto"</emu-val>.</li></ol></li><li>Set <var>style</var> to <emu-val>"numeric"</emu-val>.</li></ol></li><li>Else,<ol><li>Set <var>displayDefault</var> to <emu-val>"auto"</emu-val>.</li><li>Set <var>style</var> to <var>baseStyle</var>.</li></ol></li></ol></li></ol></li><li>If <var>style</var> is <emu-val>"numeric"</emu-val>, then<ol><li>If <var>unit</var> is one of <emu-val>"milliseconds"</emu-val>, <emu-val>"microseconds"</emu-val>, or <emu-val>"nanoseconds"</emu-val>, then<ol><li>Set <var>style</var> to <emu-val>"fractional"</emu-val>.</li><li>Set <var>displayDefault</var> to <emu-val>"auto"</emu-val>.</li></ol></li></ol></li><li>Let <var>displayField</var> be the <emu-xref href="#string-concatenation"><a href="https://tc39.es/ecma262/#string-concatenation">string-concatenation</a></emu-xref> of <var>unit</var> and <emu-val>"Display"</emu-val>.</li><li>Let <var>display</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <var>displayField</var>, <emu-const>string</emu-const>, « <emu-val>"auto"</emu-val>, <emu-val>"always"</emu-val> », <var>displayDefault</var>).</li><li>If <var>display</var> is <emu-val>"always"</emu-val> and <var>style</var> is <emu-val>"fractional"</emu-val>, then<ol><li>Throw a <emu-val>RangeError</emu-val> exception.</li></ol></li><li>If <var>prevStyle</var> is <emu-val>"fractional"</emu-val>, then<ol><li>If <var>style</var> is not <emu-val>"fractional"</emu-val>, then<ol><li>Throw a <emu-val>RangeError</emu-val> exception.</li></ol></li></ol></li><li>If <var>prevStyle</var> is <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val>, then<ol><li>If <var>style</var> is not <emu-val>"fractional"</emu-val>, <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val>, then<ol><li>Throw a <emu-val>RangeError</emu-val> exception.</li></ol></li><li>If <var>unit</var> is <emu-val>"minutes"</emu-val> or <emu-val>"seconds"</emu-val>, then<ol><li>Set <var>style</var> to <emu-val>"2-digit"</emu-val>.</li></ol></li></ol></li><li>If <var>unit</var> is <emu-val>"hours"</emu-val> and <var>twoDigitHours</var> is <emu-val>true</emu-val>, then<ol><li>Set <var>style</var> to <emu-val>"2-digit"</emu-val>.</li></ol></li><li>Return the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> {
           <var class="field">[[Style]]</var>: <var>style</var>,
           <var class="field">[[Display]]</var>: <var>display</var>
 &nbsp;}.</li></ol></emu-alg>
@@ -2817,13 +2817,54 @@ <h1><span class="secnum">1.1.7</span> AddFractionalDigits ( <var>durationFormat<
       <emu-alg><ol><li>Let <var>result</var> be 0.</li><li>Let <var>exponent</var> be 3.</li><li>For each row of <emu-xref href="#table-partition-duration-format-pattern" id="_ref_3"><a href="#table-partition-duration-format-pattern">Table 2</a></emu-xref>, except the header row, in table order, do<ol><li>Let <var>style</var> be the value of <var>durationFormat</var>'s internal slot whose name is the Style Slot value of the current row.</li><li>If <var>style</var> is <emu-val>"fractional"</emu-val>, then<ol><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: The Unit value of the current row is <emu-val>"milliseconds"</emu-val>, <emu-val>"microseconds"</emu-val>, or <emu-val>"nanoseconds"</emu-val>.</li><li>Let <var>value</var> be the value of <var>duration</var>'s field whose name is the Value Field value of the current row.</li><li>Set <var>value</var> to <var>value</var> / 10<sup><var>exponent</var></sup>.</li><li>Set <var>result</var> to <var>result</var> + <var>value</var>.</li><li>Set <var>exponent</var> to <var>exponent</var> + 3.</li></ol></li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
     </emu-clause>
 
+    <emu-clause id="sec-nextunitfractional" type="abstract operation" aoid="NextUnitFractional">
+      <h1><span class="secnum">1.1.8</span> NextUnitFractional ( <var>durationFormat</var>, <var>unit</var> )</h1>
+      <p>The abstract operation NextUnitFractional takes arguments <var>durationFormat</var> (a DurationFormat Object) and <var>unit</var> (a String) and returns a Boolean. It returns <emu-val>true</emu-val> if the next smallest unit uses the <emu-val>"fractional"</emu-val> style. It performs the following steps when called:</p>
+
+      <emu-alg><ol><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>unit</var> is <emu-val>"seconds"</emu-val>, <emu-val>"milliseconds"</emu-val>, or <emu-val>"microseconds"</emu-val>.</li><li>If <var>unit</var> is <emu-val>"seconds"</emu-val> and <var>durationFormat</var>.<var class="field">[[MillisecondsStyle]]</var> is <emu-val>"fractional"</emu-val>, return <emu-val>true</emu-val>.</li><li>Else if <var>unit</var> is <emu-val>"milliseconds"</emu-val> and <var>durationFormat</var>.<var class="field">[[MicrosecondsStyle]]</var> is <emu-val>"fractional"</emu-val>, return <emu-val>true</emu-val>.</li><li>Else if <var>unit</var> is <emu-val>"microseconds"</emu-val> and <var>durationFormat</var>.<var class="field">[[NanosecondsStyle]]</var> is <emu-val>"fractional"</emu-val>, return <emu-val>true</emu-val>.</li><li>Return <emu-val>false</emu-val>.</li></ol></emu-alg>
+    </emu-clause>
+
+    <emu-clause id="sec-formatnumerichours" type="abstract operation" aoid="FormatNumericHours">
+      <h1><span class="secnum">1.1.9</span> FormatNumericHours ( <var>durationFormat</var>, <var>hoursValue</var>, <var>signDisplayed</var> )</h1>
+      <p>The abstract operation FormatNumericHours takes arguments <var>durationFormat</var> (a DurationFormat object), <var>hoursValue</var> (an <emu-xref href="#integer"><a href="https://tc39.es/ecma262/#integer">integer</a></emu-xref>), and <var>signDisplayed</var> (a Boolean) and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Records</a></emu-xref>. It creates a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Records</a></emu-xref> containing the formatted parts of <var>hoursValue</var> interpreted as the value of a <emu-xref href="#sec-duration-records" id="_ref_26"><a href="#sec-duration-records">Duration Record</a></emu-xref>'s <var class="field">[[Hours]]</var> field according to the effective locale and the formatting options of <var>durationFormat</var>. It performs the following steps when called:</p>
+
+      <emu-alg><ol><li>Let <var>hoursStyle</var> be <var>durationFormat</var>.<var class="field">[[HoursStyle]]</var>.</li><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>hoursStyle</var> is <emu-val>"numeric"</emu-val> or <var>hoursStyle</var> is <emu-val>"2-digit"</emu-val>.</li><li>Let <var>result</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>Let <var>nfOpts</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(<emu-val>null</emu-val>).</li><li>Let <var>numberingSystem</var> be <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var>.</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"numberingSystem"</emu-val>, <var>numberingSystem</var>).</li><li>If <var>hoursStyle</var> is <emu-val>"2-digit"</emu-val>, then<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"minimumIntegerDigits"</emu-val>, <emu-val>2</emu-val><sub>𝔽</sub>).</li></ol></li><li>If <var>signDisplayed</var> is <emu-val>false</emu-val>, then<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"signDisplay"</emu-val>, <emu-val>"never"</emu-val>).</li></ol></li><li>Let <var>nf</var> be !&nbsp;<emu-xref aoid="Construct"><a href="https://tc39.es/ecma262/#sec-construct">Construct</a></emu-xref>(%NumberFormat%, « <var>durationFormat</var>.<var class="field">[[Locale]]</var>, <var>nfOpts</var> »).</li><li>Let <var>hoursParts</var> be !&nbsp;<emu-xref aoid="PartitionNumberPattern"><a href="https://tc39.github.io/ecma402/#sec-partitionnumberpattern">PartitionNumberPattern</a></emu-xref>(<var>nf</var>, <var>hoursValue</var>).</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>&nbsp;} <var>part</var> of <var>hoursParts</var>, do<ol><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <var>part</var>.<var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>: <var>part</var>.<var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>: <emu-val>"hour"</emu-val>&nbsp;} to <var>result</var>.</li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
+    </emu-clause>
+
+    <emu-clause id="sec-formatnumericminutes" type="abstract operation" aoid="FormatNumericMinutes">
+      <h1><span class="secnum">1.1.10</span> FormatNumericMinutes ( <var>durationFormat</var>, <var>minutesValue</var>, <var>hoursDisplayed</var>, <var>signDisplayed</var> )</h1>
+      <p>The abstract operation FormatNumericMinutes takes arguments <var>durationFormat</var> (a DurationFormat Object), <var>minutesValue</var> (an <emu-xref href="#integer"><a href="https://tc39.es/ecma262/#integer">integer</a></emu-xref>), <var>hoursDisplayed</var> (a Boolean), and <var>signDisplayed</var> (a Boolean) and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Records</a></emu-xref>. It creates a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Records</a></emu-xref> containing the formatted parts of <var>minutesValue</var> interpreted as the value of a <emu-xref href="#sec-duration-records" id="_ref_27"><a href="#sec-duration-records">Duration Record</a></emu-xref>'s <var class="field">[[Minutes]]</var> field according to the effective locale and the formatting options of <var>durationFormat</var>. It performs the following steps when called:</p>
+
+      <emu-alg><ol><li>Let <var>result</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>If <var>hoursDisplayed</var> is <emu-val>true</emu-val>, then<ol><li>Let <var>separator</var> be <var>durationFormat</var>.<var class="field">[[DigitalFormat]]</var>.<var class="field">[[HoursMinutesSeparator]]</var>.</li><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <emu-val>"literal"</emu-val>, <var class="field">[[Value]]</var>: <var>separator</var>, <var class="field">[[Unit]]</var>: <emu-const>empty</emu-const>&nbsp;} to <var>result</var>.</li></ol></li><li>Let <var>minutesStyle</var> be <var>durationFormat</var>.<var class="field">[[MinutesStyle]]</var>.</li><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>minutesStyle</var> is <emu-val>"numeric"</emu-val> or <var>minutesStyle</var> is <emu-val>"2-digit"</emu-val>.</li><li>Let <var>nfOpts</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(<emu-val>null</emu-val>).</li><li>Let <var>numberingSystem</var> be <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var>.</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"numberingSystem"</emu-val>, <var>numberingSystem</var>).</li><li>If <var>minutesStyle</var> is <emu-val>"2-digit"</emu-val>, then<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"minimumIntegerDigits"</emu-val>, <emu-val>2</emu-val><sub>𝔽</sub>).</li></ol></li><li>If <var>signDisplayed</var> is <emu-val>false</emu-val>, then<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"signDisplay"</emu-val>, <emu-val>"never"</emu-val>).</li></ol></li><li>Let <var>nf</var> be !&nbsp;<emu-xref aoid="Construct"><a href="https://tc39.es/ecma262/#sec-construct">Construct</a></emu-xref>(%NumberFormat%, « <var>durationFormat</var>.<var class="field">[[Locale]]</var>, <var>nfOpts</var> »).</li><li>Let <var>minutesParts</var> be !&nbsp;<emu-xref aoid="PartitionNumberPattern"><a href="https://tc39.github.io/ecma402/#sec-partitionnumberpattern">PartitionNumberPattern</a></emu-xref>(<var>nf</var>, <var>minutesValue</var>).</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>&nbsp;} <var>part</var> of <var>minutesParts</var>, do<ol><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <var>part</var>.<var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>: <var>part</var>.<var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>: <emu-val>"minute"</emu-val>&nbsp;} to <var>result</var>.</li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
+    </emu-clause>
+
+    <emu-clause id="sec-formatnumericseconds" type="abstract operation" aoid="FormatNumericSeconds">
+      <h1><span class="secnum">1.1.11</span> FormatNumericSeconds ( <var>durationFormat</var>, <var>secondsValue</var>, <var>minutesDisplayed</var>, <var>signDisplayed</var> )</h1>
+      <p>The abstract operation FormatNumericSeconds takes arguments <var>durationFormat</var> (a DurationFormat Object), <var>secondsValue</var> (an <emu-xref href="#integer"><a href="https://tc39.es/ecma262/#integer">integer</a></emu-xref>), <var>minutesDisplayed</var> (a Boolean), and <var>signDisplayed</var> (a Boolean) and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Records</a></emu-xref>. It creates a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Records</a></emu-xref> containing the formatted parts of <var>secondsValue</var> interpreted as the value of a <emu-xref href="#sec-duration-records" id="_ref_28"><a href="#sec-duration-records">Duration Record</a></emu-xref>'s <var class="field">[[Seconds]]</var> field according to the effective locale and the formatting options of <var>durationFormat</var>. It performs the following steps when called:</p>
+
+      <emu-alg><ol><li>Let <var>secondsStyle</var> be <var>durationFormat</var>.<var class="field">[[SecondsStyle]]</var>.</li><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>secondsStyle</var> is <emu-val>"numeric"</emu-val> or <var>secondsStyle</var> is <emu-val>"2-digit"</emu-val>.</li><li>Let <var>result</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>If <var>minutesDisplayed</var> is <emu-val>true</emu-val>, then<ol><li>Let <var>separator</var> be <var>durationFormat</var>.<var class="field">[[DigitalFormat]]</var>.<var class="field">[[MinutesSecondsSeparator]]</var>.</li><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <emu-val>"literal"</emu-val>, <var class="field">[[Value]]</var>: <var>separator</var>, <var class="field">[[Unit]]</var>: <emu-const>empty</emu-const>&nbsp;} to <var>result</var>.</li></ol></li><li>Let <var>nfOpts</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(<emu-val>null</emu-val>).</li><li>Let <var>numberingSystem</var> be <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var>.</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"numberingSystem"</emu-val>, <var>numberingSystem</var>).</li><li>If <var>secondsStyle</var> is <emu-val>"2-digit"</emu-val>, then<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"minimumIntegerDigits"</emu-val>, <emu-val>2</emu-val><sub>𝔽</sub>).</li></ol></li><li>If <var>signDisplayed</var> is <emu-val>false</emu-val>, then<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"signDisplay"</emu-val>, <emu-val>"never"</emu-val>).</li></ol></li><li>Let <var>nf</var> be !&nbsp;<emu-xref aoid="Construct"><a href="https://tc39.es/ecma262/#sec-construct">Construct</a></emu-xref>(%NumberFormat%, « <var>durationFormat</var>.<var class="field">[[Locale]]</var>, <var>nfOpts</var> »).</li><li>If <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var> is <emu-val>undefined</emu-val>, then<ol><li>Let <var>maximumFractionDigits</var> be <emu-val>9</emu-val><sub>𝔽</sub>.</li><li>Let <var>minimumFractionDigits</var> be <emu-val>+0</emu-val><sub>𝔽</sub>.</li></ol></li><li>Else,<ol><li>Let <var>maximumFractionDigits</var> be <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var>.</li><li>Let <var>minimumFractionDigits</var> be <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var>.</li></ol></li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"maximumFractionDigits"</emu-val>, <var>maximumFractionDigits</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"minimumFractionDigits"</emu-val>, <var>minimumFractionDigits</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"roundingMode"</emu-val>, <emu-val>"trunc"</emu-val>).</li><li>Let <var>secondsParts</var> be !&nbsp;<emu-xref aoid="PartitionNumberPattern"><a href="https://tc39.github.io/ecma402/#sec-partitionnumberpattern">PartitionNumberPattern</a></emu-xref>(<var>nf</var>, <var>secondsValue</var>).</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>&nbsp;} <var>part</var> of <var>secondsParts</var>, do<ol><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <var>part</var>.<var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>: <var>part</var>.<var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>: <emu-val>"second"</emu-val>&nbsp;} to <var>result</var>.</li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
+    </emu-clause>
+
+    <emu-clause id="sec-formatnumericunits" type="abstract operation" aoid="FormatNumericUnits">
+      <h1><span class="secnum">1.1.12</span> FormatNumericUnits ( <var>durationFormat</var>, <var>duration</var>, <var>firstNumericUnit</var>, <var>signDisplayed</var> )</h1>
+      <p>The abstract operation FormatNumericUnits takes arguments <var>durationFormat</var> (a DurationFormat Object), <var>duration</var> (a <emu-xref href="#sec-duration-records" id="_ref_29"><a href="#sec-duration-records">Duration Record</a></emu-xref>), <var>firstNumericUnit</var> (a String), and <var>signDisplayed</var> (a Boolean) and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Records</a></emu-xref>. It creates a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Lists</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Records</a></emu-xref> containing the formatted parts of <var>duration</var> that use <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val> style according to the effective locale and the formatting options of <var>durationFormat</var>. It performs the following steps when called:</p>
+
+      <emu-alg><ol><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>firstNumericUnit</var> is <emu-val>"hours"</emu-val>, <emu-val>"minutes"</emu-val>, or <emu-val>"seconds"</emu-val>.</li><li>Let <var>numericPartsList</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>Let <var>hoursValue</var> be <var>duration</var>.<var class="field">[[Hours]]</var>.</li><li>Let <var>hoursDisplay</var> be <var>durationFormat</var>.<var class="field">[[HoursDisplay]]</var>.</li><li>Let <var>minutesValue</var> be <var>duration</var>.<var class="field">[[Minutes]]</var>.</li><li>Let <var>minutesDisplay</var> be <var>durationFormat</var>.<var class="field">[[MinutesDisplay]]</var>.</li><li>Let <var>secondsValue</var> be <var>duration</var>.<var class="field">[[Seconds]]</var>.</li><li>If <var>duration</var>.<var class="field">[[Milliseconds]]</var> is not 0 or <var>duration</var>.<var class="field">[[Microseconds]]</var> is not 0 or <var>duration</var>.<var class="field">[[Nanoseconds]]</var> is not 0, then<ol><li>Set <var>secondsValue</var> to <var>secondsValue</var> + <emu-xref aoid="AddFractionalDigits" id="_ref_30"><a href="#sec-addfractionaldigits">AddFractionalDigits</a></emu-xref>(<var>durationFormat</var>, <var>duration</var>).</li></ol></li><li>Let <var>secondsDisplay</var> be <var>durationFormat</var>.<var class="field">[[SecondsDisplay]]</var>.</li><li>Let <var>hoursFormatted</var> be <emu-val>false</emu-val>.</li><li>If <var>firstNumericUnit</var> is <emu-val>"hours"</emu-val>, then<ol><li>If <var>hoursValue</var> is not 0 or <var>hoursDisplay</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Set <var>hoursFormatted</var> to <emu-val>true</emu-val>.</li></ol></li></ol></li><li>If <var>secondsValue</var> is not 0 or <var>secondsDisplay</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Let <var>secondsFormatted</var> be <emu-val>true</emu-val>.</li></ol></li><li>Else,<ol><li>Let <var>secondsFormatted</var> be <emu-val>false</emu-val>.</li></ol></li><li>Let <var>minutesFormatted</var> be <emu-val>false</emu-val>.</li><li>If <var>firstNumericUnit</var> is <emu-val>"hours"</emu-val> or <var>firstNumericUnit</var> is <emu-val>"minutes"</emu-val>, then<ol><li>If <var>hoursFormatted</var> is <emu-val>true</emu-val> and <var>secondsFormatted</var> is <emu-val>true</emu-val>, then<ol><li>Set <var>minutesFormatted</var> to <emu-val>true</emu-val>.</li></ol></li><li>Else if <var>minutesValue</var> is not 0 or <var>minutesDisplay</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Set <var>minutesFormatted</var> to <emu-val>true</emu-val>.</li></ol></li></ol></li><li>If <var>hoursFormatted</var> is <emu-val>true</emu-val>, then<ol><li>Append <emu-xref aoid="FormatNumericHours" id="_ref_31"><a href="#sec-formatnumerichours">FormatNumericHours</a></emu-xref>(<var>durationFormat</var>, <var>hoursValue</var>, <var>signDisplayed</var>) to <var>numericPartsList</var>.</li><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li></ol></li><li>If <var>minutesFormatted</var> is <emu-val>true</emu-val>, then<ol><li>Append <emu-xref aoid="FormatNumericMinutes" id="_ref_32"><a href="#sec-formatnumericminutes">FormatNumericMinutes</a></emu-xref>(<var>durationFormat</var>, <var>minutesValue</var>, <var>hoursFormatted</var>, <var>signDisplayed</var>) to <var>numericPartsList</var>.</li><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li></ol></li><li>If <var>secondsFormatted</var> is <emu-val>true</emu-val>, then<ol><li>Append <emu-xref aoid="FormatNumericSeconds" id="_ref_33"><a href="#sec-formatnumericseconds">FormatNumericSeconds</a></emu-xref>(<var>durationFormat</var>, <var>secondsValue</var>, <var>minutesFormatted</var>, <var>signDisplayed</var>) to <var>numericPartsList</var>.</li><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li></ol></li><li>Return <var>numericPartsList</var>.</li></ol></emu-alg>
+    </emu-clause>
+
+    <emu-clause id="sec-listformatparts" type="abstract operation" aoid="ListFormatParts">
+      <h1><span class="secnum">1.1.13</span> ListFormatParts ( <var>durationFormat</var>, <var>partitionedPartsList</var> )</h1>
+      <p>The abstract operation ListFormatParts takes arguments <var>durationFormat</var> (a DurationFormat Object) and <var>partitionedPartsList</var> (a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Lists</a></emu-xref> of <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Records</a></emu-xref>) and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>. It creates and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> with all the corresponding parts according to the effective locale and the formatting options of <var>durationFormat</var>. It performs the following steps when called:</p>
+      <emu-alg><ol><li>Let <var>lfOpts</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(<emu-val>null</emu-val>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>lfOpts</var>, <emu-val>"type"</emu-val>, <emu-val>"unit"</emu-val>).</li><li>Let <var>listStyle</var> be <var>durationFormat</var>.<var class="field">[[Style]]</var>.</li><li>If <var>listStyle</var> is <emu-val>"digital"</emu-val>, then<ol><li>Set <var>listStyle</var> to <emu-val>"short"</emu-val>.</li></ol></li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>lfOpts</var>, <emu-val>"style"</emu-val>, <var>listStyle</var>).</li><li>Let <var>lf</var> be !&nbsp;<emu-xref aoid="Construct"><a href="https://tc39.es/ecma262/#sec-construct">Construct</a></emu-xref>(%ListFormat%, « <var>durationFormat</var>.<var class="field">[[Locale]]</var>, <var>lfOpts</var> »).</li><li>Let <var>strings</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>For each element <var>parts</var> of <var>partitionedPartsList</var>, do<ol><li>Let <var>string</var> be the empty String.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Set <var>string</var> to the <emu-xref href="#string-concatenation"><a href="https://tc39.es/ecma262/#string-concatenation">string-concatenation</a></emu-xref> of <var>string</var> and <var>part</var>.<var class="field">[[Value]]</var>.</li></ol></li><li>Append <var>string</var> to <var>strings</var>.</li></ol></li><li>Let <var>formattedPartsList</var> be <emu-xref aoid="CreatePartsFromList"><a href="https://tc39.github.io/ecma402/#sec-createpartsfromlist">CreatePartsFromList</a></emu-xref>(<var>lf</var>, <var>strings</var>).</li><li>Let <var>partitionedPartsIndex</var> be 0.</li><li>Let <var>partitionedLength</var> be the number of elements in <var>partitionedPartsList</var>.</li><li>Let <var>flattenedPartsList</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>&nbsp;} <var>listPart</var> in <var>formattedPartsList</var>, do<ol><li>If <var>listPart</var>.<var class="field">[[Type]]</var> is <emu-val>"element"</emu-val>, then<ol><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>partitionedPartsIndex</var> &lt; <var>partitionedLength</var>.</li><li>Let <var>parts</var> be <var>partitionedPartsList</var>[<var>partitionedPartsIndex</var>].</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Append <var>part</var> to <var>flattenedPartsList</var>.</li></ol></li><li>Set <var>partitionedPartsIndex</var> to <var>partitionedPartsIndex</var> + 1.</li></ol></li><li>Else,<ol><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>listPart</var>.<var class="field">[[Type]]</var> is <emu-val>"literal"</emu-val>.</li><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <emu-val>"literal"</emu-val>, <var class="field">[[Value]]</var>: <var>listPart</var>.<var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>: <emu-const>empty</emu-const>&nbsp;} to <var>flattenedPartsList</var>.</li></ol></li></ol></li><li>Return <var>flattenedPartsList</var>.</li></ol></emu-alg>
+    </emu-clause>
+
     <emu-clause id="sec-partitiondurationformatpattern" type="abstract operation" aoid="PartitionDurationFormatPattern">
-      <h1><span class="secnum">1.1.8</span> PartitionDurationFormatPattern ( <var>durationFormat</var>, <var>duration</var> )</h1>
-      <p>The abstract operation PartitionDurationFormatPattern takes arguments <var>durationFormat</var> (a DurationFormat) and <var>duration</var> (a <emu-xref href="#sec-duration-records" id="_ref_26"><a href="#sec-duration-records">Duration Record</a></emu-xref>) and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>. It creates and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> with all the corresponding parts according to the effective locale and the formatting options of <var>durationFormat</var>. It performs the following steps when called:</p>
+      <h1><span class="secnum">1.1.14</span> PartitionDurationFormatPattern ( <var>durationFormat</var>, <var>duration</var> )</h1>
+      <p>The abstract operation PartitionDurationFormatPattern takes arguments <var>durationFormat</var> (a DurationFormat) and <var>duration</var> (a <emu-xref href="#sec-duration-records" id="_ref_34"><a href="#sec-duration-records">Duration Record</a></emu-xref>) and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>. It creates and returns a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> with all the corresponding parts according to the effective locale and the formatting options of <var>durationFormat</var>. It performs the following steps when called:</p>
 
-      <emu-alg><ol><li>Let <var>result</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>Let <var>done</var> be <emu-val>false</emu-val>.</li><li>Let <var>needSeparator</var> be <emu-val>false</emu-val>.</li><li>Let <var>displayNegativeSign</var> be <emu-val>true</emu-val>.</li><li>Let <var>dataLocale</var> be <var>durationFormat</var>.<var class="field">[[DataLocale]]</var>.</li><li>Let <var>dataLocaleData</var> be <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_27"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[LocaleData]]</var>.[[&lt;<var>dataLocale</var>&gt;]].</li><li>Let <var>numberingSystem</var> be <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var>.</li><li>Let <var>separator</var> be <var>dataLocaleData</var>.<var class="field">[[digitalFormat]]</var>.[[&lt;<var>numberingSystem</var>&gt;]].</li><li>While <var>done</var> is <emu-val>false</emu-val>, repeat for each row in <emu-xref href="#table-partition-duration-format-pattern" id="_ref_4"><a href="#table-partition-duration-format-pattern">Table 2</a></emu-xref> in table order, except the header row:<ol><li>Let <var>value</var> be the value of <var>duration</var>'s field whose name is the Value Field value of the current row.</li><li>Let <var>style</var> be the value of <var>durationFormat</var>'s internal slot whose name is the Style Slot value of the current row.</li><li>Let <var>display</var> be the value of <var>durationFormat</var>'s internal slot whose name is the Display Slot value of the current row.</li><li>Let <var>unit</var> be the Unit value of the current row.</li><li>Let <var>numberFormatUnit</var> be the NumberFormat Unit value of the current row.</li><li>Let <var>nfOpts</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(<emu-val>null</emu-val>).</li><li>If <var>unit</var> is <emu-val>"seconds"</emu-val>, <emu-val>"milliseconds"</emu-val>, or <emu-val>"microseconds"</emu-val>, then<ol><li>If <var>unit</var> is <emu-val>"seconds"</emu-val>, then<ol><li>Let <var>nextStyle</var> be <var>durationFormat</var>.<var class="field">[[MillisecondsStyle]]</var>.</li></ol></li><li>Else if <var>unit</var> is <emu-val>"milliseconds"</emu-val>, then<ol><li>Let <var>nextStyle</var> be <var>durationFormat</var>.<var class="field">[[MicrosecondsStyle]]</var>.</li></ol></li><li>Else,<ol><li>Let <var>nextStyle</var> be <var>durationFormat</var>.<var class="field">[[NanosecondsStyle]]</var>.</li></ol></li><li>If <var>nextStyle</var> is <emu-val>"fractional"</emu-val>, then<ol><li>Set <var>value</var> to <var>value</var> + <emu-xref aoid="AddFractionalDigits" id="_ref_28"><a href="#sec-addfractionaldigits">AddFractionalDigits</a></emu-xref>(<var>durationFormat</var>, <var>duration</var>).</li><li>If <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var> is <emu-val>undefined</emu-val>, then<ol><li>Let <var>maximumFractionDigits</var> be <emu-val>9</emu-val><sub>𝔽</sub>.</li><li>Let <var>minimumFractionDigits</var> be <emu-val>+0</emu-val><sub>𝔽</sub>.</li></ol></li><li>Else,<ol><li>Let <var>maximumFractionDigits</var> be <emu-xref aoid="𝔽"><a href="https://tc39.es/ecma262/#𝔽">𝔽</a></emu-xref>(<var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var>).</li><li>Let <var>minimumFractionDigits</var> be <emu-xref aoid="𝔽"><a href="https://tc39.es/ecma262/#𝔽">𝔽</a></emu-xref>(<var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var>).</li></ol></li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"maximumFractionDigits"</emu-val>, <var>maximumFractionDigits</var> ).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"minimumFractionDigits"</emu-val>, <var>minimumFractionDigits</var> ).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"roundingMode"</emu-val>, <emu-val>"trunc"</emu-val>).</li><li>Set <var>done</var> to <emu-val>true</emu-val>.</li></ol></li></ol></li><li>Let <var>displayRequired</var> be <emu-val>false</emu-val>.</li><li>Let <var>hoursStyle</var> be <var>durationFormat</var>.<var class="field">[[HoursStyle]]</var>.</li><li>If <var>unit</var> is <emu-val>"minutes"</emu-val>, then<ol><li>If <var>hoursStyle</var> is <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val>, then<ol><li>Let <var>hoursDisplay</var> be <var>durationFormat</var>.<var class="field">[[HoursDisplay]]</var>.</li><li>Let <var>hoursValue</var> be <var>durationFormat</var>.<var class="field">[[HoursValue]]</var>.</li><li>If <var>hoursDisplay</var> is <emu-val>"always"</emu-val> or <var>hoursValue</var> is not 0, then<ol><li>Let <var>secondsDisplay</var> be <var>durationFormat</var>.<var class="field">[[SecondsDisplay]]</var>.</li><li>Let <var>secondsValue</var> be <var>durationFormat</var>.<var class="field">[[SecondsValue]]</var>.</li><li>If <var>secondsDisplay</var> is <emu-val>"always"</emu-val> or <var>secondsValue</var> is not 0, then<ol><li>Set <var>displayRequired</var> to <emu-val>true</emu-val>.</li></ol></li></ol></li></ol></li></ol></li><li>If <var>value</var> is not 0 or <var>display</var> is not <emu-val>"auto"</emu-val> or <var>displayRequired</var> is <emu-val>true</emu-val>, then<ol><li>If <var>displayNegativeSign</var> is <emu-val>true</emu-val>, then<ol><li>Set <var>displayNegativeSign</var> to <emu-val>false</emu-val>.</li><li>If <var>value</var> is 0 and <emu-xref aoid="DurationRecordSign" id="_ref_29"><a href="#sec-durationrecordsign">DurationRecordSign</a></emu-xref>(<var>duration</var>) is -1, then<ol><li>Set <var>value</var> to <emu-const>negative-zero</emu-const>.</li></ol></li></ol></li><li>Else,<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"signDisplay"</emu-val>, <emu-val>"never"</emu-val>).</li></ol></li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"numberingSystem"</emu-val>, <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var>).</li><li>If <var>style</var> is <emu-val>"2-digit"</emu-val>, then<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"minimumIntegerDigits"</emu-val>, <emu-val>2</emu-val><sub>𝔽</sub>).</li></ol></li><li>If <var>style</var> is not <emu-val>"fractional"</emu-val>, <emu-val>"numeric"</emu-val>, or <emu-val>"2-digit"</emu-val>, then<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"style"</emu-val>, <emu-val>"unit"</emu-val>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"unit"</emu-val>, <var>numberFormatUnit</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"unitDisplay"</emu-val>, <var>style</var>).</li></ol></li><li>Let <var>nf</var> be !&nbsp;<emu-xref aoid="Construct"><a href="https://tc39.es/ecma262/#sec-construct">Construct</a></emu-xref>(%NumberFormat%, « <var>durationFormat</var>.<var class="field">[[Locale]]</var>, <var>nfOpts</var> »).</li><li>If <var>needSeparator</var> is <emu-val>false</emu-val>, then<ol><li>Let <var>list</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li></ol></li><li>Else,<ol><li>Let <var>list</var> be the last element of <var>result</var>.</li><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <emu-val>"literal"</emu-val>, <var class="field">[[Value]]</var>: <var>separator</var>, <var class="field">[[Unit]]</var>: <emu-const>empty</emu-const>&nbsp;} to <var>list</var>.</li></ol></li><li>Let <var>parts</var> be !&nbsp;<emu-xref aoid="PartitionNumberPattern"><a href="https://tc39.github.io/ecma402/#sec-partitionnumberpattern">PartitionNumberPattern</a></emu-xref>(<var>nf</var>, <var>value</var>).</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>&nbsp;} <var>part</var> of <var>parts</var>, do<ol><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <var>part</var>.<var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>: <var>part</var>.<var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>: <var>numberFormatUnit</var>&nbsp;} to <var>list</var>.</li></ol></li><li>If <var>needSeparator</var> is <emu-val>false</emu-val>, then<ol><li>If <var>style</var> is <emu-val>"2-digit"</emu-val> or <emu-val>"numeric"</emu-val>, then<ol><li>Set <var>needSeparator</var> to <emu-val>true</emu-val>.</li></ol></li><li>Append <var>list</var> to <var>result</var>.</li></ol></li></ol></li><li>Else,<ol><li>Set <var>needSeparator</var> to <emu-val>false</emu-val>.</li></ol></li></ol></li><li>Let <var>lfOpts</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(<emu-val>null</emu-val>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>lfOpts</var>, <emu-val>"type"</emu-val>, <emu-val>"unit"</emu-val>).</li><li>Let <var>listStyle</var> be <var>durationFormat</var>.<var class="field">[[Style]]</var>.</li><li>If <var>listStyle</var> is <emu-val>"digital"</emu-val>, then<ol><li>Set <var>listStyle</var> to <emu-val>"short"</emu-val>.</li></ol></li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>lfOpts</var>, <emu-val>"style"</emu-val>, <var>listStyle</var>).</li><li>Let <var>lf</var> be !&nbsp;<emu-xref aoid="Construct"><a href="https://tc39.es/ecma262/#sec-construct">Construct</a></emu-xref>(%ListFormat%, « <var>durationFormat</var>.<var class="field">[[Locale]]</var>, <var>lfOpts</var> »).</li><li>Let <var>strings</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>For each element <var>parts</var> of <var>result</var>, do<ol><li>Let <var>string</var> be the empty String.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Set <var>string</var> to the <emu-xref href="#string-concatenation"><a href="https://tc39.es/ecma262/#string-concatenation">string-concatenation</a></emu-xref> of <var>string</var> and <var>part</var>.<var class="field">[[Value]]</var>.</li></ol></li><li>Append <var>string</var> to <var>strings</var>.</li></ol></li><li>Let <var>formatted</var> be <emu-xref aoid="CreatePartsFromList"><a href="https://tc39.github.io/ecma402/#sec-createpartsfromlist">CreatePartsFromList</a></emu-xref>(<var>lf</var>, <var>strings</var>).</li><li>Let <var>resultIndex</var> be 0.</li><li>Let <var>resultLength</var> be the number of elements in <var>result</var>.</li><li>Let <var>flattened</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>&nbsp;} <var>listPart</var> in <var>formatted</var>, do<ol><li>If <var>listPart</var>.<var class="field">[[Type]]</var> is <emu-val>"element"</emu-val>, then<ol><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>resultIndex</var> &lt; <var>resultLength</var>.</li><li>Let <var>parts</var> be <var>result</var>[<var>resultIndex</var>].</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Append <var>part</var> to <var>flattened</var>.</li></ol></li><li>Set <var>resultIndex</var> to <var>resultIndex</var> + 1.</li></ol></li><li>Else,<ol><li><emu-xref href="#assert"><a href="https://tc39.es/ecma262/#assert">Assert</a></emu-xref>: <var>listPart</var>.<var class="field">[[Type]]</var> is <emu-val>"literal"</emu-val>.</li><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <emu-val>"literal"</emu-val>, <var class="field">[[Value]]</var>: <var>listPart</var>.<var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>: <emu-const>empty</emu-const>&nbsp;} to <var>flattened</var>.</li></ol></li></ol></li><li>Return <var>flattened</var>.</li></ol></emu-alg>
+      <emu-alg><ol><li>Let <var>result</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>Let <var>signDisplayed</var> be <emu-val>true</emu-val>.</li><li>Let <var>numericUnitFound</var> be <emu-val>false</emu-val>.</li><li>While <var>numericUnitFound</var> is <emu-val>false</emu-val>, repeat for each row in <emu-xref href="#table-partition-duration-format-pattern" id="_ref_4"><a href="#table-partition-duration-format-pattern">Table 2</a></emu-xref> in table order, except the header row:<ol><li>Let <var>value</var> be the value of <var>duration</var>'s field whose name is the Value Field value of the current row.</li><li>Let <var>style</var> be the value of <var>durationFormat</var>'s internal slot whose name is the Style Slot value of the current row.</li><li>Let <var>display</var> be the value of <var>durationFormat</var>'s internal slot whose name is the Display Slot value of the current row.</li><li>Let <var>unit</var> be the Unit value of the current row.</li><li>If <var>style</var> is <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val>, then<ol><li>Append <emu-xref aoid="FormatNumericUnits" id="_ref_35"><a href="#sec-formatnumericunits">FormatNumericUnits</a></emu-xref>(<var>durationFormat</var>, <var>duration</var>, <var>unit</var>, <var>signDisplayed</var>) to <var>result</var>.</li><li>Set <var>numericUnitFound</var> to <emu-val>true</emu-val>.</li></ol></li><li>Else,<ol><li>Let <var>nfOpts</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(<emu-val>null</emu-val>).</li><li>If <var>unit</var> is <emu-val>"seconds"</emu-val>, <emu-val>"milliseconds"</emu-val>, or <emu-val>"microseconds"</emu-val>, then<ol><li>If <emu-xref aoid="NextUnitFractional" id="_ref_36"><a href="#sec-nextunitfractional">NextUnitFractional</a></emu-xref>(<var>durationFormat</var>, <var>unit</var>) is <emu-val>true</emu-val>, then<ol><li>Set <var>value</var> to <var>value</var> + <emu-xref aoid="AddFractionalDigits" id="_ref_37"><a href="#sec-addfractionaldigits">AddFractionalDigits</a></emu-xref>(<var>durationFormat</var>, <var>duration</var>).</li><li>If <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var> is <emu-val>undefined</emu-val>, then<ol><li>Let <var>maximumFractionDigits</var> be <emu-val>9</emu-val><sub>𝔽</sub>.</li><li>Let <var>minimumFractionDigits</var> be <emu-val>+0</emu-val><sub>𝔽</sub>.</li></ol></li><li>Else,<ol><li>Let <var>maximumFractionDigits</var> be <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var>.</li><li>Let <var>minimumFractionDigits</var> be <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var>.</li></ol></li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"maximumFractionDigits"</emu-val>, <var>maximumFractionDigits</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"minimumFractionDigits"</emu-val>, <var>minimumFractionDigits</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"roundingMode"</emu-val>, <emu-val>"trunc"</emu-val>).</li><li>Set <var>numericUnitFound</var> to <emu-val>true</emu-val>.</li></ol></li></ol></li><li>If <var>value</var> is not 0 or <var>display</var> is not <emu-val>"auto"</emu-val>, then<ol><li>Let <var>numberingSystem</var> be <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var>.</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"numberingSystem"</emu-val>, <var>numberingSystem</var>).</li><li>If <var>signDisplayed</var> is <emu-val>true</emu-val>, then<ol><li>Set <var>signDisplayed</var> to <emu-val>false</emu-val>.</li><li>If <var>value</var> is 0 and <emu-xref aoid="DurationRecordSign" id="_ref_38"><a href="#sec-durationrecordsign">DurationRecordSign</a></emu-xref>(<var>duration</var>) is -1, then<ol><li>Set <var>value</var> to <emu-const>negative-zero</emu-const>.</li></ol></li></ol></li><li>Else,<ol><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"signDisplay"</emu-val>, <emu-val>"never"</emu-val>).</li></ol></li><li>Let <var>numberFormatUnit</var> be the NumberFormat Unit value of the current row.</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"style"</emu-val>, <emu-val>"unit"</emu-val>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"unit"</emu-val>, <var>numberFormatUnit</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>nfOpts</var>, <emu-val>"unitDisplay"</emu-val>, <var>style</var>).</li><li>Let <var>nf</var> be !&nbsp;<emu-xref aoid="Construct"><a href="https://tc39.es/ecma262/#sec-construct">Construct</a></emu-xref>(%NumberFormat%, « <var>durationFormat</var>.<var class="field">[[Locale]]</var>, <var>nfOpts</var> »).</li><li>Let <var>parts</var> be !&nbsp;<emu-xref aoid="PartitionNumberPattern"><a href="https://tc39.github.io/ecma402/#sec-partitionnumberpattern">PartitionNumberPattern</a></emu-xref>(<var>nf</var>, <var>value</var>).</li><li>Let <var>list</var> be a new empty <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref>.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>&nbsp;} <var>part</var> of <var>parts</var>, do<ol><li>Append the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>: <var>part</var>.<var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>: <var>part</var>.<var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>: <var>numberFormatUnit</var>&nbsp;} to <var>list</var>.</li></ol></li><li>Append <var>list</var> to <var>result</var>.</li></ol></li></ol></li></ol></li><li>Return <emu-xref aoid="ListFormatParts" id="_ref_39"><a href="#sec-listformatparts">ListFormatParts</a></emu-xref>(<var>durationFormat</var>, <var>result</var>).</li></ol></emu-alg>
 
-    <emu-table id="table-partition-duration-format-pattern"><figure><figcaption>Table 2: DurationFormat instance internal slots and properties relevant to <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_30"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref></figcaption>
+    <emu-table id="table-partition-duration-format-pattern"><figure><figcaption>Table 2: DurationFormat instance internal slots and properties relevant to <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_40"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref></figcaption>
       
         <table class="real-table">
           <thead>
@@ -2920,7 +2961,7 @@ <h1><span class="secnum">1.2.1</span> Intl.DurationFormat ( [ <var>locales</var>
 
       <p>When the <code>Intl.DurationFormat</code> function is called with optional arguments <var>locales</var> and <var>options</var>, the following steps are taken:</p>
 
-      <emu-alg><ol><li>If NewTarget is <emu-val>undefined</emu-val>, throw a <emu-val>TypeError</emu-val> exception.</li><li>Let <var>durationFormat</var> be ?&nbsp;<emu-xref aoid="OrdinaryCreateFromConstructor"><a href="https://tc39.es/ecma262/#sec-ordinarycreatefromconstructor">OrdinaryCreateFromConstructor</a></emu-xref>(NewTarget, <emu-val>"%DurationFormatPrototype%"</emu-val>, « <var class="field">[[InitializedDurationFormat]]</var>, <var class="field">[[Locale]]</var>, <var class="field">[[DataLocale]]</var>, <var class="field">[[NumberingSystem]]</var>, <var class="field">[[Style]]</var>, <var class="field">[[YearsStyle]]</var>, <var class="field">[[YearsDisplay]]</var>, <var class="field">[[MonthsStyle]]</var>, <var class="field">[[MonthsDisplay]]</var> , <var class="field">[[WeeksStyle]]</var>, <var class="field">[[WeeksDisplay]]</var> , <var class="field">[[DaysStyle]]</var>, <var class="field">[[DaysDisplay]]</var> , <var class="field">[[HoursStyle]]</var>, <var class="field">[[HoursDisplay]]</var> , <var class="field">[[MinutesStyle]]</var>, <var class="field">[[MinutesDisplay]]</var> , <var class="field">[[SecondsStyle]]</var>, <var class="field">[[SecondsDisplay]]</var> , <var class="field">[[MillisecondsStyle]]</var>, <var class="field">[[MillisecondsDisplay]]</var> , <var class="field">[[MicrosecondsStyle]]</var>, <var class="field">[[MicrosecondsDisplay]]</var> , <var class="field">[[NanosecondsStyle]]</var>, <var class="field">[[NanosecondsDisplay]]</var>, <var class="field">[[FractionalDigits]]</var> »).</li><li>Let <var>requestedLocales</var> be ?&nbsp;<emu-xref aoid="CanonicalizeLocaleList"><a href="https://tc39.github.io/ecma402/#sec-canonicalizelocalelist">CanonicalizeLocaleList</a></emu-xref>(<var>locales</var>).</li><li>Let <var>options</var> be ?&nbsp;<emu-xref aoid="GetOptionsObject"><a href="https://tc39.github.io/ecma402/#sec-getoptionsobject">GetOptionsObject</a></emu-xref>(<var>options</var>).</li><li>Let <var>matcher</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"localeMatcher"</emu-val>, <emu-const>string</emu-const>, « <emu-val>"lookup"</emu-val>, <emu-val>"best fit"</emu-val> », <emu-val>"best fit"</emu-val>).</li><li>Let <var>numberingSystem</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"numberingSystem"</emu-val>, <emu-const>string</emu-const>, <emu-val>undefined</emu-val>, <emu-val>undefined</emu-val>).</li><li>If <var>numberingSystem</var> is not <emu-val>undefined</emu-val>, then<ol><li>If <var>numberingSystem</var> does not match the Unicode Locale Identifier <code>type</code> nonterminal, throw a <emu-val>RangeError</emu-val> exception.</li></ol></li><li>Let <var>opt</var> be the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[localeMatcher]]</var>: <var>matcher</var>, <var class="field">[[nu]]</var>: <var>numberingSystem</var>&nbsp;}.</li><li>Let <var>r</var> be <emu-xref aoid="ResolveLocale"><a href="https://tc39.github.io/ecma402/#sec-resolvelocale">ResolveLocale</a></emu-xref>(<emu-xref href="#sec-intl-durationformat-constructor" id="_ref_31"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[AvailableLocales]]</var>, <var>requestedLocales</var>, <var>opt</var>, <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_32"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[RelevantExtensionKeys]]</var>, <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_33"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[LocaleData]]</var>).</li><li>Let <var>locale</var> be r.<var class="field">[[locale]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[Locale]]</var> to <var>locale</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var> to <var>r</var>.<var class="field">[[nu]]</var>.</li><li>Let <var>style</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"style"</emu-val>, <emu-const>string</emu-const>, « <emu-val>"long"</emu-val>, <emu-val>"short"</emu-val>, <emu-val>"narrow"</emu-val>, <emu-val>"digital"</emu-val> », <emu-val>"short"</emu-val>).</li><li>Set <var>durationFormat</var>.<var class="field">[[Style]]</var> to <var>style</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[DataLocale]]</var> to <var>r</var>.<var class="field">[[dataLocale]]</var>.</li><li>Let <var>prevStyle</var> be the empty String.</li><li>For each row of <emu-xref href="#table-durationformat" id="_ref_5"><a href="#table-durationformat">Table 3</a></emu-xref>, except the header row, in table order, do<ol><li>Let <var>styleSlot</var> be the Style Slot value of the current row.</li><li>Let <var>displaySlot</var> be the Display Slot value of the current row.</li><li>Let <var>unit</var> be the Unit value of the current row.</li><li>Let <var>valueList</var> be the Values value of the current row.</li><li>Let <var>digitalBase</var> be the Digital Default value of the current row.</li><li>Let <var>unitOptions</var> be ?&nbsp;<emu-xref aoid="GetDurationUnitOptions" id="_ref_34"><a href="#sec-getdurationunitoptions">GetDurationUnitOptions</a></emu-xref>(<var>unit</var>, <var>options</var>, <var>style</var>, <var>valueList</var>, <var>digitalBase</var>, <var>prevStyle</var>).</li><li>Set the value of the <var>styleSlot</var> slot of <var>durationFormat</var> to <var>unitOptions</var>.<var class="field">[[Style]]</var>.</li><li>Set the value of the <var>displaySlot</var> slot of <var>durationFormat</var> to <var>unitOptions</var>.<var class="field">[[Display]]</var>.</li><li>If <var>unit</var> is one of <emu-val>"hours"</emu-val>, <emu-val>"minutes"</emu-val>, <emu-val>"seconds"</emu-val>, <emu-val>"milliseconds"</emu-val>, or <emu-val>"microseconds"</emu-val>, then<ol><li>Set <var>prevStyle</var> to <var>unitOptions</var>.<var class="field">[[Style]]</var>.</li></ol></li></ol></li><li>Set <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var> to ?&nbsp;<emu-xref aoid="GetNumberOption"><a href="https://tc39.github.io/ecma402/#sec-getnumberoption">GetNumberOption</a></emu-xref>(<var>options</var>, <emu-val>"fractionalDigits"</emu-val>, 0, 9, <emu-val>undefined</emu-val>).</li><li>Return <var>durationFormat</var>.</li></ol></emu-alg>
+      <emu-alg><ol><li>If NewTarget is <emu-val>undefined</emu-val>, throw a <emu-val>TypeError</emu-val> exception.</li><li>Let <var>durationFormat</var> be ?&nbsp;<emu-xref aoid="OrdinaryCreateFromConstructor"><a href="https://tc39.es/ecma262/#sec-ordinarycreatefromconstructor">OrdinaryCreateFromConstructor</a></emu-xref>(NewTarget, <emu-val>"%DurationFormatPrototype%"</emu-val>, « <var class="field">[[InitializedDurationFormat]]</var>, <var class="field">[[Locale]]</var>, <var class="field">[[DataLocale]]</var>, <var class="field">[[NumberingSystem]]</var>, <var class="field">[[Style]]</var>, <var class="field">[[YearsStyle]]</var>, <var class="field">[[YearsDisplay]]</var>, <var class="field">[[MonthsStyle]]</var>, <var class="field">[[MonthsDisplay]]</var>, <var class="field">[[WeeksStyle]]</var>, <var class="field">[[WeeksDisplay]]</var>, <var class="field">[[DaysStyle]]</var>, <var class="field">[[DaysDisplay]]</var>, <var class="field">[[HoursStyle]]</var>, <var class="field">[[HoursDisplay]]</var>, <var class="field">[[MinutesStyle]]</var>, <var class="field">[[MinutesDisplay]]</var>, <var class="field">[[SecondsStyle]]</var>, <var class="field">[[SecondsDisplay]]</var>, <var class="field">[[MillisecondsStyle]]</var>, <var class="field">[[MillisecondsDisplay]]</var>, <var class="field">[[MicrosecondsStyle]]</var>, <var class="field">[[MicrosecondsDisplay]]</var>, <var class="field">[[NanosecondsStyle]]</var>, <var class="field">[[NanosecondsDisplay]]</var>, <var class="field">[[HoursMinutesSeparator]]</var>, <var class="field">[[MinutesSecondsSeparator]]</var>, <var class="field">[[FractionalDigits]]</var>, <var class="field">[[TwoDigitHours]]</var> »).</li><li>Let <var>requestedLocales</var> be ?&nbsp;<emu-xref aoid="CanonicalizeLocaleList"><a href="https://tc39.github.io/ecma402/#sec-canonicalizelocalelist">CanonicalizeLocaleList</a></emu-xref>(<var>locales</var>).</li><li>Let <var>options</var> be ?&nbsp;<emu-xref aoid="GetOptionsObject"><a href="https://tc39.github.io/ecma402/#sec-getoptionsobject">GetOptionsObject</a></emu-xref>(<var>options</var>).</li><li>Let <var>matcher</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"localeMatcher"</emu-val>, <emu-const>string</emu-const>, « <emu-val>"lookup"</emu-val>, <emu-val>"best fit"</emu-val> », <emu-val>"best fit"</emu-val>).</li><li>Let <var>numberingSystem</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"numberingSystem"</emu-val>, <emu-const>string</emu-const>, <emu-val>undefined</emu-val>, <emu-val>undefined</emu-val>).</li><li>If <var>numberingSystem</var> is not <emu-val>undefined</emu-val>, then<ol><li>If <var>numberingSystem</var> does not match the Unicode Locale Identifier <code>type</code> nonterminal, throw a <emu-val>RangeError</emu-val> exception.</li></ol></li><li>Let <var>opt</var> be the <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[localeMatcher]]</var>: <var>matcher</var>, <var class="field">[[nu]]</var>: <var>numberingSystem</var>&nbsp;}.</li><li>Let <var>r</var> be <emu-xref aoid="ResolveLocale"><a href="https://tc39.github.io/ecma402/#sec-resolvelocale">ResolveLocale</a></emu-xref>(<emu-xref href="#sec-intl-durationformat-constructor" id="_ref_41"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[AvailableLocales]]</var>, <var>requestedLocales</var>, <var>opt</var>, <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_42"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[RelevantExtensionKeys]]</var>, <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_43"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[LocaleData]]</var>).</li><li>Let <var>locale</var> be r.<var class="field">[[locale]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[Locale]]</var> to <var>locale</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[DataLocale]]</var> to <var>r</var>.<var class="field">[[dataLocale]]</var>.</li><li>Let <var>dataLocale</var> be <var>durationFormat</var>.<var class="field">[[DataLocale]]</var>.</li><li>Let <var>dataLocaleData</var> be <var>durationFormat</var>.<var class="field">[[LocaleData]]</var>.[[&lt;<var>dataLocale</var>&gt;]].</li><li>Let <var>digitalFormat</var> be <var>dataLocaleData</var>.<var class="field">[[DigitalFormat]]</var>.</li><li>Let <var>twoDigitHours</var> be <var>digitalFormat</var>.<var class="field">[[TwoDigitHours]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[TwoDigitHours]]</var> to <var>twoDigitHours</var>.</li><li>Let <var>hoursMinutesSeparator</var> be <var>digitalFormat</var>.<var class="field">[[HoursMinutesSeparator]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[HoursMinutesSeparator]]</var> to <var>hoursMinutesSeparator</var>.</li><li>Let <var>minutesSecondsSeparator</var> be <var>digitalFormat</var>.<var class="field">[[MinutesSecondsSeparator]]</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[MinutesSecondsSeparator]]</var> to <var>minutesSecondsSeparator</var>.</li><li>Set <var>durationFormat</var>.<var class="field">[[NumberingSystem]]</var> to <var>r</var>.<var class="field">[[nu]]</var>.</li><li>Let <var>style</var> be ?&nbsp;<emu-xref aoid="GetOption"><a href="https://tc39.github.io/ecma402/#sec-getoption">GetOption</a></emu-xref>(<var>options</var>, <emu-val>"style"</emu-val>, <emu-const>string</emu-const>, « <emu-val>"long"</emu-val>, <emu-val>"short"</emu-val>, <emu-val>"narrow"</emu-val>, <emu-val>"digital"</emu-val> », <emu-val>"short"</emu-val>).</li><li>Set <var>durationFormat</var>.<var class="field">[[Style]]</var> to <var>style</var>.</li><li>Let <var>prevStyle</var> be the empty String.</li><li>For each row of <emu-xref href="#table-durationformat" id="_ref_5"><a href="#table-durationformat">Table 3</a></emu-xref>, except the header row, in table order, do<ol><li>Let <var>styleSlot</var> be the Style Slot value of the current row.</li><li>Let <var>displaySlot</var> be the Display Slot value of the current row.</li><li>Let <var>unit</var> be the Unit value of the current row.</li><li>Let <var>valueList</var> be the Values value of the current row.</li><li>Let <var>digitalBase</var> be the Digital Default value of the current row.</li><li>Let <var>unitOptions</var> be ?&nbsp;<emu-xref aoid="GetDurationUnitOptions" id="_ref_44"><a href="#sec-getdurationunitoptions">GetDurationUnitOptions</a></emu-xref>(<var>unit</var>, <var>options</var>, <var>style</var>, <var>valueList</var>, <var>digitalBase</var>, <var>prevStyle</var>, <var>twoDigitHours</var>).</li><li>Set the value of the <var>styleSlot</var> slot of <var>durationFormat</var> to <var>unitOptions</var>.<var class="field">[[Style]]</var>.</li><li>Set the value of the <var>displaySlot</var> slot of <var>durationFormat</var> to <var>unitOptions</var>.<var class="field">[[Display]]</var>.</li><li>If <var>unit</var> is one of <emu-val>"hours"</emu-val>, <emu-val>"minutes"</emu-val>, <emu-val>"seconds"</emu-val>, <emu-val>"milliseconds"</emu-val>, or <emu-val>"microseconds"</emu-val>, then<ol><li>Set <var>prevStyle</var> to <var>unitOptions</var>.<var class="field">[[Style]]</var>.</li></ol></li></ol></li><li>Set <var>durationFormat</var>.<var class="field">[[FractionalDigits]]</var> to ?&nbsp;<emu-xref aoid="GetNumberOption"><a href="https://tc39.github.io/ecma402/#sec-getnumberoption">GetNumberOption</a></emu-xref>(<var>options</var>, <emu-val>"fractionalDigits"</emu-val>, 0, 9, <emu-val>undefined</emu-val>).</li><li>Return <var>durationFormat</var>.</li></ol></emu-alg>
       <emu-table id="table-durationformat"><figure><figcaption>Table 3: Internal slots and property names of DurationFormat instances relevant to Intl.DurationFormat <emu-xref href="#constructor"><a href="https://tc39.es/ecma262/#constructor">constructor</a></emu-xref></figcaption>
       
         <table class="real-table">
@@ -3016,7 +3057,7 @@ <h1><span class="secnum">1.3</span> Properties of the Intl.DurationFormat Constr
         <emu-clause id="sec-Intl.DurationFormat.prototype">
           <h1><span class="secnum">1.3.1</span> Intl.DurationFormat.prototype</h1>
 
-          <p>The value of <code>Intl.DurationFormat.prototype</code> is <emu-xref href="#sec-properties-of-intl-durationformat-prototype-object" id="_ref_35"><a href="#sec-properties-of-intl-durationformat-prototype-object">%DurationFormatPrototype%</a></emu-xref>.</p>
+          <p>The value of <code>Intl.DurationFormat.prototype</code> is <emu-xref href="#sec-properties-of-intl-durationformat-prototype-object" id="_ref_45"><a href="#sec-properties-of-intl-durationformat-prototype-object">%DurationFormatPrototype%</a></emu-xref>.</p>
 
           <p>This property has the attributes { <var class="field">[[Writable]]</var>: <emu-val>false</emu-val>, <var class="field">[[Enumerable]]</var>: <emu-val>false</emu-val>, <var class="field">[[Configurable]]</var>: <emu-val>false</emu-val> }.</p>
         </emu-clause>
@@ -3026,7 +3067,7 @@ <h1><span class="secnum">1.3.2</span> Intl.DurationFormat.supportedLocalesOf ( <
 
           <p>When the <code>supportedLocalesOf</code> method is called with arguments <var>locales</var> and <var>options</var>, the following steps are taken:</p>
 
-          <emu-alg><ol><li>Let <var>availableLocales</var> be <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_36"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[AvailableLocales]]</var>.</li><li>Let <var>requestedLocales</var> be ?&nbsp;<emu-xref aoid="CanonicalizeLocaleList"><a href="https://tc39.github.io/ecma402/#sec-canonicalizelocalelist">CanonicalizeLocaleList</a></emu-xref>(<var>locales</var>).</li><li>Return ?&nbsp;<emu-xref aoid="SupportedLocales"><a href="https://tc39.github.io/ecma402/#sec-supportedlocales">SupportedLocales</a></emu-xref>(<var>availableLocales</var>, <var>requestedLocales</var>, <var>options</var>).</li></ol></emu-alg>
+          <emu-alg><ol><li>Let <var>availableLocales</var> be <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_46"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.<var class="field">[[AvailableLocales]]</var>.</li><li>Let <var>requestedLocales</var> be ?&nbsp;<emu-xref aoid="CanonicalizeLocaleList"><a href="https://tc39.github.io/ecma402/#sec-canonicalizelocalelist">CanonicalizeLocaleList</a></emu-xref>(<var>locales</var>).</li><li>Return ?&nbsp;<emu-xref aoid="SupportedLocales"><a href="https://tc39.github.io/ecma402/#sec-supportedlocales">SupportedLocales</a></emu-xref>(<var>availableLocales</var>, <var>requestedLocales</var>, <var>options</var>).</li></ol></emu-alg>
         </emu-clause>
 
         <emu-clause id="sec-Intl.DurationFormat-internal-slots">
@@ -3040,7 +3081,12 @@ <h1><span class="secnum">1.3.3</span> Internal slots</h1>
 
       <ul>
         <li><var class="field">[[LocaleData]]</var>.[[&lt;<var>locale</var>&gt;]].<var class="field">[[nu]]</var> must be a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">List</a></emu-xref> as specified in <emu-xref href="#sec-intl.numberformat-internal-slots"><a href="https://tc39.github.io/ecma402/#sec-intl.numberformat-internal-slots">12.3.3</a></emu-xref>.</li>
-        <li><var class="field">[[LocaleData]]</var>.[[&lt;<var>locale</var>&gt;]].<var class="field">[[digitalFormat]]</var> must be a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> with keys corresponding to each numbering system available for the given locale and String values containing the appropriate time unit separator for that combination of locale and numbering system.</li>
+        <li><var class="field">[[LocaleData]]</var>.[[&lt;<var>locale</var>&gt;]].<var class="field">[[DigitalFormat]]</var> must be a <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> with keys corresponding to each numbering system available for the given locale, with <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> values containing the following fields:
+          <ul><li><var class="field">[[HourMinutesSeparator]]</var> <emu-xref href="#sec-ecmascript-language-types-string-type"><a href="https://tc39.es/ecma262/#sec-ecmascript-language-types-string-type">is a String</a></emu-xref> value that is the appropriate separator between hours and minutes for that combination of locale, numbering system, and unit when using <emu-val>"numeric"</emu-val> or "2-digit" styles</li>
+            <li><var class="field">[[MinutesSecondsSeparator]]</var> <emu-xref href="#sec-ecmascript-language-types-string-type"><a href="https://tc39.es/ecma262/#sec-ecmascript-language-types-string-type">is a String</a></emu-xref> value that is the appropriate separator between minutes and seconds for that combination of locale, numbering system, and unit when using <emu-val>"numeric"</emu-val> or <emu-val>"2-digit"</emu-val> styles.</li>
+            <li><var class="field">[[TwoDigitHours]]</var> <emu-xref href="#sec-ecmascript-language-types-boolean-type"><a href="https://tc39.es/ecma262/#sec-ecmascript-language-types-boolean-type">is a Boolean</a></emu-xref> value indicating whether hours are always displayed using two digits when the <emu-val>"numeric"</emu-val> style is used.</li>
+          </ul>
+        </li>
       </ul>
 
           <emu-note><span class="note">Note</span><div class="note-contents">It is recommended that implementations use the locale data provided by the Common Locale Data Repository (available at <a href="http://cldr.unicode.org/">http://cldr.unicode.org/</a>).</div></emu-note>
@@ -3055,7 +3101,7 @@ <h1><span class="secnum">1.4</span> Properties of the Intl.DurationFormat Protot
         <emu-clause id="sec-Intl.DurationFormat.prototype.constructor">
           <h1><span class="secnum">1.4.1</span> Intl.DurationFormat.prototype.constructor</h1>
 
-          <p>The initial value of <code>Intl.DurationFormat.prototype.constructor</code> is the intrinsic object <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_37"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.</p>
+          <p>The initial value of <code>Intl.DurationFormat.prototype.constructor</code> is the intrinsic object <emu-xref href="#sec-intl-durationformat-constructor" id="_ref_47"><a href="#sec-intl-durationformat-constructor">%DurationFormat%</a></emu-xref>.</p>
         </emu-clause>
 
         <emu-clause id="sec-Intl.DurationFormat.prototype-@@tostringtag">
@@ -3070,14 +3116,14 @@ <h1><span class="secnum">1.4.3</span> Intl.DurationFormat.prototype.format ( <va
 
           <p>When the <code>format</code> method is called with an argument <var>duration</var>, the following steps are taken:</p>
 
-          <emu-alg><ol><li>Let <var>df</var> be <emu-val>this</emu-val> value.</li><li>Perform ?&nbsp;<emu-xref aoid="RequireInternalSlot"><a href="https://tc39.es/ecma262/#sec-requireinternalslot">RequireInternalSlot</a></emu-xref>(<var>df</var>, <var class="field">[[InitializedDurationFormat]]</var>).</li><li>Let <var>record</var> be ?&nbsp;<emu-xref aoid="ToDurationRecord" id="_ref_38"><a href="#sec-todurationrecord">ToDurationRecord</a></emu-xref>(<var>duration</var>).</li><li>Let <var>parts</var> be <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_39"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref>(<var>df</var>, <var>record</var>).</li><li>Let <var>result</var> be the empty String.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Set <var>result</var> to the <emu-xref href="#string-concatenation"><a href="https://tc39.es/ecma262/#string-concatenation">string-concatenation</a></emu-xref> of <var>result</var> and <var>part</var>.<var class="field">[[Value]]</var>.</li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
+          <emu-alg><ol><li>Let <var>df</var> be <emu-val>this</emu-val> value.</li><li>Perform ?&nbsp;<emu-xref aoid="RequireInternalSlot"><a href="https://tc39.es/ecma262/#sec-requireinternalslot">RequireInternalSlot</a></emu-xref>(<var>df</var>, <var class="field">[[InitializedDurationFormat]]</var>).</li><li>Let <var>record</var> be ?&nbsp;<emu-xref aoid="ToDurationRecord" id="_ref_48"><a href="#sec-todurationrecord">ToDurationRecord</a></emu-xref>(<var>duration</var>).</li><li>Let <var>parts</var> be <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_49"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref>(<var>df</var>, <var>record</var>).</li><li>Let <var>result</var> be the empty String.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Set <var>result</var> to the <emu-xref href="#string-concatenation"><a href="https://tc39.es/ecma262/#string-concatenation">string-concatenation</a></emu-xref> of <var>result</var> and <var>part</var>.<var class="field">[[Value]]</var>.</li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
         </emu-clause>
         <emu-clause id="sec-Intl.DurationFormat.prototype.formatToParts">
           <h1><span class="secnum">1.4.4</span> Intl.DurationFormat.prototype.formatToParts ( <var>duration</var> )</h1>
 
           <p>When the <code>formatToParts</code> method is called with an argument <var>duration</var>, the following steps are taken:</p>
 
-          <emu-alg><ol><li>Let <var>df</var> be <emu-val>this</emu-val> value.</li><li>Perform ?&nbsp;<emu-xref aoid="RequireInternalSlot"><a href="https://tc39.es/ecma262/#sec-requireinternalslot">RequireInternalSlot</a></emu-xref>(<var>df</var>, <var class="field">[[InitializedDurationFormat]]</var>).</li><li>Let <var>record</var> be ?&nbsp;<emu-xref aoid="ToDurationRecord" id="_ref_40"><a href="#sec-todurationrecord">ToDurationRecord</a></emu-xref>(<var>duration</var>).</li><li>Let <var>parts</var> be <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_41"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref>(<var>df</var>, <var>record</var>).</li><li>Let <var>result</var> be !&nbsp;<emu-xref aoid="ArrayCreate"><a href="https://tc39.es/ecma262/#sec-arraycreate">ArrayCreate</a></emu-xref>(0).</li><li>Let <var>n</var> be 0.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Let <var>obj</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(%ObjectPrototype%).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"type"</emu-val>, <var>part</var>.<var class="field">[[Type]]</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"value"</emu-val>, <var>part</var>.<var class="field">[[Value]]</var>).</li><li>If <var>part</var>.<var class="field">[[Unit]]</var> is not <emu-const>empty</emu-const>, perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"unit"</emu-val>, <var>part</var>.<var class="field">[[Unit]]</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>result</var>, !&nbsp;<emu-xref aoid="ToString"><a href="https://tc39.es/ecma262/#sec-tostring">ToString</a></emu-xref>(<var>n</var>), <var>obj</var>).</li><li>Set <var>n</var> to <var>n</var> + 1.</li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
+          <emu-alg><ol><li>Let <var>df</var> be <emu-val>this</emu-val> value.</li><li>Perform ?&nbsp;<emu-xref aoid="RequireInternalSlot"><a href="https://tc39.es/ecma262/#sec-requireinternalslot">RequireInternalSlot</a></emu-xref>(<var>df</var>, <var class="field">[[InitializedDurationFormat]]</var>).</li><li>Let <var>record</var> be ?&nbsp;<emu-xref aoid="ToDurationRecord" id="_ref_50"><a href="#sec-todurationrecord">ToDurationRecord</a></emu-xref>(<var>duration</var>).</li><li>Let <var>parts</var> be <emu-xref aoid="PartitionDurationFormatPattern" id="_ref_51"><a href="#sec-partitiondurationformatpattern">PartitionDurationFormatPattern</a></emu-xref>(<var>df</var>, <var>record</var>).</li><li>Let <var>result</var> be !&nbsp;<emu-xref aoid="ArrayCreate"><a href="https://tc39.es/ecma262/#sec-arraycreate">ArrayCreate</a></emu-xref>(0).</li><li>Let <var>n</var> be 0.</li><li>For each <emu-xref href="#sec-list-and-record-specification-type"><a href="https://tc39.es/ecma262/#sec-list-and-record-specification-type">Record</a></emu-xref> { <var class="field">[[Type]]</var>, <var class="field">[[Value]]</var>, <var class="field">[[Unit]]</var>&nbsp;} <var>part</var> in <var>parts</var>, do<ol><li>Let <var>obj</var> be <emu-xref aoid="OrdinaryObjectCreate"><a href="https://tc39.es/ecma262/#sec-ordinaryobjectcreate">OrdinaryObjectCreate</a></emu-xref>(%ObjectPrototype%).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"type"</emu-val>, <var>part</var>.<var class="field">[[Type]]</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"value"</emu-val>, <var>part</var>.<var class="field">[[Value]]</var>).</li><li>If <var>part</var>.<var class="field">[[Unit]]</var> is not <emu-const>empty</emu-const>, perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>obj</var>, <emu-val>"unit"</emu-val>, <var>part</var>.<var class="field">[[Unit]]</var>).</li><li>Perform !&nbsp;<emu-xref aoid="CreateDataPropertyOrThrow"><a href="https://tc39.es/ecma262/#sec-createdatapropertyorthrow">CreateDataPropertyOrThrow</a></emu-xref>(<var>result</var>, !&nbsp;<emu-xref aoid="ToString"><a href="https://tc39.es/ecma262/#sec-tostring">ToString</a></emu-xref>(<var>n</var>), <var>obj</var>).</li><li>Set <var>n</var> to <var>n</var> + 1.</li></ol></li><li>Return <var>result</var>.</li></ol></emu-alg>
         </emu-clause>
         <emu-clause id="sec-Intl.DurationFormat.prototype.resolvedOptions">
           <h1><span class="secnum">1.4.5</span> Intl.DurationFormat.prototype.resolvedOptions ( )</h1>
@@ -3199,7 +3245,7 @@ <h1><span class="secnum">1.4.5</span> Intl.DurationFormat.prototype.resolvedOpti
       <emu-clause id="sec-properties-of-intl-durationformat-instances">
         <h1><span class="secnum">1.5</span> Properties of Intl.DurationFormat Instances</h1>
 
-        <p>Intl.DurationFormat instances inherit properties from <emu-xref href="#sec-properties-of-intl-durationformat-prototype-object" id="_ref_42"><a href="#sec-properties-of-intl-durationformat-prototype-object">%DurationFormatPrototype%</a></emu-xref>.</p>
+        <p>Intl.DurationFormat instances inherit properties from <emu-xref href="#sec-properties-of-intl-durationformat-prototype-object" id="_ref_52"><a href="#sec-properties-of-intl-durationformat-prototype-object">%DurationFormatPrototype%</a></emu-xref>.</p>
         <p>Intl.DurationFormat instances have an <var class="field">[[InitializedDurationFormat]]</var> internal slot.</p>
         <p>Intl.DurationFormat instances also have several internal slots that are computed by the <emu-xref href="#constructor"><a href="https://tc39.es/ecma262/#constructor">constructor</a></emu-xref>:</p>
 
diff --git a/spec.emu b/spec.emu
index 683a626..a0d5bac 100644
--- a/spec.emu
+++ b/spec.emu
@@ -195,6 +195,7 @@ contributors: Ujjwal Sharma, Younies Mahmoud
           _stylesList_: a List of Strings,
           _digitalBase_: a String,
           _prevStyle_: a String,
+          _twoDigitHours_: a Boolean,
         ): either a normal completion containing a Record with [[Style]] and [[Display]] fields, or an abrupt completion
       </h1>
       <dl class="header">
@@ -234,6 +235,8 @@ contributors: Ujjwal Sharma, Younies Mahmoud
             1. Throw a *RangeError* exception.
           1. If _unit_ is *"minutes"* or *"seconds"*, then
             1. Set _style_ to *"2-digit"*.
+        1. If _unit_ is *"hours"* and _twoDigitHours_ is *true*, then
+          1. Set _style_ to *"2-digit"*.
         1. Return the Record {
           [[Style]]: _style_,
           [[Display]]: _display_
@@ -268,93 +271,203 @@ contributors: Ujjwal Sharma, Younies Mahmoud
       </emu-alg>
     </emu-clause>
 
-    <emu-clause id="sec-partitiondurationformatpattern" type="abstract operation">
+    <emu-clause id="sec-nextunitfractional" type="abstract operation">
       <h1>
-        PartitionDurationFormatPattern (
-          _durationFormat_: a DurationFormat,
-          _duration_: a Duration Record,
-        ): a List
+        NextUnitFractional (
+          _durationFormat_: a DurationFormat Object,
+          _unit_: a String,
+        ): a Boolean
       </h1>
       <dl class="header">
         <dt>description</dt>
-        <dd>It creates and returns a List with all the corresponding parts according to the effective locale and the formatting options of _durationFormat_.</dd>
+        <dd>It returns *true* if the next smallest unit uses the *"fractional"* style.</dd>
       </dl>
 
       <emu-alg>
+        1. Assert: _unit_ is *"seconds"*, *"milliseconds"*, or *"microseconds"*.
+        1. If _unit_ is *"seconds"* and _durationFormat_.[[MillisecondsStyle]] is *"fractional"*, return *true*.
+        1. Else if _unit_ is *"milliseconds"* and _durationFormat_.[[MicrosecondsStyle]] is *"fractional"*, return *true*.
+        1. Else if _unit_ is *"microseconds"* and _durationFormat_.[[NanosecondsStyle]] is *"fractional"*, return *true*.
+        1. Return *false*.
+      </emu-alg>
+    </emu-clause>
+
+    <emu-clause id="sec-formatnumerichours" type="abstract operation">
+      <h1>
+        FormatNumericHours (
+          _durationFormat_: a DurationFormat object,
+          _hoursValue_: an integer,
+          _signDisplayed_: a Boolean,
+          ) : a List of Records
+      </h1>
+      <dl class="header">
+        <dt>description</dt>
+        <dd>It creates a List of Records containing the formatted parts of _hoursValue_ interpreted as the value of a Duration Record's [[Hours]] field according to the effective locale and the formatting options of _durationFormat_.</dd>
+      </dl>
+
+      <emu-alg>
+        1. Let _hoursStyle_ be _durationFormat_.[[HoursStyle]].
+        1. Assert: _hoursStyle_ is *"numeric"* or _hoursStyle_ is *"2-digit"*.
         1. Let _result_ be a new empty List.
-        1. Let _done_ be *false*.
-        1. Let _needSeparator_ be *false*.
-        1. Let _displayNegativeSign_ be *true*.
-        1. Let _dataLocale_ be _durationFormat_.[[DataLocale]].
-        1. Let _dataLocaleData_ be %DurationFormat%.[[LocaleData]].[[&lt;_dataLocale_&gt;]].
+        1. Let _nfOpts_ be OrdinaryObjectCreate(*null*).
         1. Let _numberingSystem_ be _durationFormat_.[[NumberingSystem]].
-        1. Let _separator_ be _dataLocaleData_.[[digitalFormat]].[[&lt;_numberingSystem_&gt;]].
-        1. While _done_ is *false*, repeat for each row in <emu-xref href="#table-partition-duration-format-pattern"></emu-xref> in table order, except the header row:
-          1. Let _value_ be the value of _duration_'s field whose name is the Value Field value of the current row.
-          1. Let _style_ be the value of _durationFormat_'s internal slot whose name is the Style Slot value of the current row.
-          1. Let _display_ be the value of _durationFormat_'s internal slot whose name is the Display Slot value of the current row.
-          1. Let _unit_ be the Unit value of the current row.
-          1. Let _numberFormatUnit_ be the NumberFormat Unit value of the current row.
-          1. Let _nfOpts_ be OrdinaryObjectCreate(*null*).
-          1. If _unit_ is *"seconds"*, *"milliseconds"*, or *"microseconds"*, then
-            1. If _unit_ is *"seconds"*, then
-              1. Let _nextStyle_ be _durationFormat_.[[MillisecondsStyle]].
-            1. Else if _unit_ is *"milliseconds"*, then
-              1. Let _nextStyle_ be _durationFormat_.[[MicrosecondsStyle]].
-            1. Else,
-              1. Let _nextStyle_ be _durationFormat_.[[NanosecondsStyle]].
-            1. If _nextStyle_ is *"fractional"*, then
-              1. Set _value_ to _value_ + AddFractionalDigits(_durationFormat_, _duration_).
-              1. If _durationFormat_.[[FractionalDigits]] is *undefined*, then
-                1. Let _maximumFractionDigits_ be *9*<sub>𝔽</sub>.
-                1. Let _minimumFractionDigits_ be *+0*<sub>𝔽</sub>.
-              1. Else,
-                1. Let _maximumFractionDigits_ be 𝔽(_durationFormat_.[[FractionalDigits]]).
-                1. Let _minimumFractionDigits_ be 𝔽(_durationFormat_.[[FractionalDigits]]).
-              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"maximumFractionDigits"*, _maximumFractionDigits_ ).
-              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"minimumFractionDigits"*, _minimumFractionDigits_ ).
-              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"roundingMode"*, *"trunc"*).
-              1. Set _done_ to *true*.
-          1. Let _displayRequired_ be *false*.
-          1. Let _hoursStyle_ be _durationFormat_.[[HoursStyle]].
-          1. If _unit_ is *"minutes"*, then
-              1. If _hoursStyle_ is *"numeric"* or *"2-digit"*, then
-                1. Let _hoursDisplay_ be _durationFormat_.[[HoursDisplay]].
-                1. Let _hoursValue_ be _durationFormat_.[[HoursValue]].
-                1. If _hoursDisplay_ is *"always"* or _hoursValue_ is not 0, then
-                  1. Let _secondsDisplay_ be _durationFormat_.[[SecondsDisplay]].
-                  1. Let _secondsValue_ be _durationFormat_.[[SecondsValue]].
-                  1. If _secondsDisplay_ is *"always"* or _secondsValue_ is not 0, then
-                    1. Set _displayRequired_ to *true*.
-          1. If _value_ is not 0 or _display_ is not *"auto"* or _displayRequired_ is *true*, then
-            1. If _displayNegativeSign_ is *true*, then
-              1. Set _displayNegativeSign_ to *false*.
-              1. If _value_ is 0 and DurationRecordSign(_duration_) is -1, then
-                1. Set _value_ to ~negative-zero~.
-            1. Else,
-              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"signDisplay"*, *"never"*).
-            1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"numberingSystem"*, _durationFormat_.[[NumberingSystem]]).
-            1. If _style_ is *"2-digit"*, then
-              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"minimumIntegerDigits"*, *2*<sub>𝔽</sub>).
-            1. If _style_ is not *"fractional"*, *"numeric"*, or *"2-digit"*, then
-              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"style"*, *"unit"*).
-              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"unit"*, _numberFormatUnit_).
-              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"unitDisplay"*, _style_).
-            1. Let _nf_ be ! Construct(%NumberFormat%, &laquo; _durationFormat_.[[Locale]], _nfOpts_ &raquo;).
-            1. If _needSeparator_ is *false*, then
-              1. Let _list_ be a new empty List.
-            1. Else,
-              1. Let _list_ be the last element of _result_.
-              1. Append the Record { [[Type]]: *"literal"*, [[Value]]: _separator_, [[Unit]]: ~empty~ } to _list_.
-            1. Let _parts_ be ! PartitionNumberPattern(_nf_, _value_).
-            1. For each Record { [[Type]], [[Value]] } _part_ of _parts_, do
-              1. Append the Record { [[Type]]: _part_.[[Type]], [[Value]]: _part_.[[Value]], [[Unit]]: _numberFormatUnit_ } to _list_.
-            1. If _needSeparator_ is *false*, then
-              1. If _style_ is *"2-digit"* or *"numeric"*, then
-                1. Set _needSeparator_ to *true*.
-              1. Append _list_ to _result_.
-          1. Else,
-            1. Set _needSeparator_ to *false*.
+        1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"numberingSystem"*, _numberingSystem_).
+        1. If _hoursStyle_ is *"2-digit"*, then
+          1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"minimumIntegerDigits"*, *2*<sub>𝔽</sub>).
+        1. If _signDisplayed_ is *false*, then
+          1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"signDisplay"*, *"never"*).
+        1. Let _nf_ be ! Construct(%NumberFormat%, &laquo; _durationFormat_.[[Locale]], _nfOpts_ &raquo;).
+        1. Let _hoursParts_ be ! PartitionNumberPattern(_nf_, _hoursValue_).
+        1. For each Record { [[Type]], [[Value]] } _part_ of _hoursParts_, do
+          1. Append the Record { [[Type]]: _part_.[[Type]], [[Value]]: _part_.[[Value]], [[Unit]]: *"hour"* } to _result_.
+        1. Return _result_.
+      </emu-alg>
+    </emu-clause>
+
+    <emu-clause id="sec-formatnumericminutes" type="abstract operation">
+      <h1>
+        FormatNumericMinutes (
+          _durationFormat_: a DurationFormat Object,
+          _minutesValue_: an integer,
+          _hoursDisplayed_: a Boolean,
+          _signDisplayed_: a Boolean,
+          ) : a List of Records
+      </h1>
+      <dl class="header">
+        <dt>description</dt>
+        <dd>It creates a List of Records containing the formatted parts of _minutesValue_ interpreted as the value of a Duration Record's [[Minutes]] field according to the effective locale and the formatting options of _durationFormat_.</dd>
+      </dl>
+
+      <emu-alg>
+        1. Let _result_ be a new empty List.
+        1. If _hoursDisplayed_ is *true*, then
+          1. Let _separator_ be _durationFormat_.[[DigitalFormat]].[[HoursMinutesSeparator]].
+          1. Append the Record { [[Type]]: *"literal"*, [[Value]]: _separator_, [[Unit]]: ~empty~ } to _result_.
+        1. Let _minutesStyle_ be _durationFormat_.[[MinutesStyle]].
+        1. Assert: _minutesStyle_ is *"numeric"* or _minutesStyle_ is *"2-digit"*.
+        1. Let _nfOpts_ be OrdinaryObjectCreate(*null*).
+        1. Let _numberingSystem_ be _durationFormat_.[[NumberingSystem]].
+        1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"numberingSystem"*, _numberingSystem_).
+        1. If _minutesStyle_ is *"2-digit"*, then
+          1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"minimumIntegerDigits"*, *2*<sub>𝔽</sub>).
+        1. If _signDisplayed_ is *false*, then
+          1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"signDisplay"*, *"never"*).
+        1. Let _nf_ be ! Construct(%NumberFormat%, &laquo; _durationFormat_.[[Locale]], _nfOpts_ &raquo;).
+        1. Let _minutesParts_ be ! PartitionNumberPattern(_nf_, _minutesValue_).
+        1. For each Record { [[Type]], [[Value]] } _part_ of _minutesParts_, do
+          1. Append the Record { [[Type]]: _part_.[[Type]], [[Value]]: _part_.[[Value]], [[Unit]]: *"minute"* } to _result_.
+        1. Return _result_.
+      </emu-alg>
+    </emu-clause>
+
+    <emu-clause id="sec-formatnumericseconds" type="abstract operation">
+      <h1>
+        FormatNumericSeconds (
+          _durationFormat_: a DurationFormat Object,
+          _secondsValue_: an integer,
+          _minutesDisplayed_ : a Boolean,
+          _signDisplayed_: a Boolean,
+          ) : a List of Records
+      </h1>
+      <dl class="header">
+        <dt>description</dt>
+        <dd>It creates a List of Records containing the formatted parts of _secondsValue_ interpreted as the value of a Duration Record's [[Seconds]] field according to the effective locale and the formatting options of _durationFormat_.</dd>
+      </dl>
+
+      <emu-alg>
+        1. Let _secondsStyle_ be _durationFormat_.[[SecondsStyle]].
+        1. Assert: _secondsStyle_ is *"numeric"* or _secondsStyle_ is *"2-digit"*.
+        1. Let _result_ be a new empty List.
+        1. If _minutesDisplayed_ is *true*, then
+          1. Let _separator_ be _durationFormat_.[[DigitalFormat]].[[MinutesSecondsSeparator]].
+          1. Append the Record { [[Type]]: *"literal"*, [[Value]]: _separator_, [[Unit]]: ~empty~ } to _result_.
+        1. Let _nfOpts_ be OrdinaryObjectCreate(*null*).
+        1. Let _numberingSystem_ be _durationFormat_.[[NumberingSystem]].
+        1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"numberingSystem"*, _numberingSystem_).
+        1. If _secondsStyle_ is *"2-digit"*, then
+          1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"minimumIntegerDigits"*, *2*<sub>𝔽</sub>).
+        1. If _signDisplayed_ is *false*, then
+          1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"signDisplay"*, *"never"*).
+        1. Let _nf_ be ! Construct(%NumberFormat%, &laquo; _durationFormat_.[[Locale]], _nfOpts_ &raquo;).
+        1. If _durationFormat_.[[FractionalDigits]] is *undefined*, then
+          1. Let _maximumFractionDigits_ be *9*<sub>𝔽</sub>.
+          1. Let _minimumFractionDigits_ be *+0*<sub>𝔽</sub>.
+        1. Else,
+          1. Let _maximumFractionDigits_ be _durationFormat_.[[FractionalDigits]].
+          1. Let _minimumFractionDigits_ be _durationFormat_.[[FractionalDigits]].
+        1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"maximumFractionDigits"*, _maximumFractionDigits_).
+        1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"minimumFractionDigits"*, _minimumFractionDigits_).
+        1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"roundingMode"*, *"trunc"*).
+        1. Let _secondsParts_ be ! PartitionNumberPattern(_nf_, _secondsValue_).
+        1. For each Record { [[Type]], [[Value]] } _part_ of _secondsParts_, do
+          1. Append the Record { [[Type]]: _part_.[[Type]], [[Value]]: _part_.[[Value]], [[Unit]]: *"second"* } to _result_.
+        1. Return _result_.
+        </emu-alg>
+    </emu-clause>
+
+    <emu-clause id="sec-formatnumericunits" type="abstract operation">
+      <h1>
+        FormatNumericUnits (
+          _durationFormat_: a DurationFormat Object,
+          _duration_: a Duration Record,
+          _firstNumericUnit_: a String,
+          _signDisplayed_: a Boolean,
+        ): a List of Records
+      </h1>
+      <dl class="header">
+        <dt>description</dt>
+        <dd>It creates a List of Lists of Records containing the formatted parts of _duration_ that use *"numeric"* or *"2-digit"* style according to the effective locale and the formatting options of _durationFormat_.</dd>
+      </dl>
+
+      <emu-alg>
+        1. Assert: _firstNumericUnit_ is *"hours"*, *"minutes"*, or *"seconds"*.
+        1. Let _numericPartsList_ be a new empty List.
+        1. Let _hoursValue_ be _duration_.[[Hours]].
+        1. Let _hoursDisplay_ be _durationFormat_.[[HoursDisplay]].
+        1. Let _minutesValue_ be _duration_.[[Minutes]].
+        1. Let _minutesDisplay_ be _durationFormat_.[[MinutesDisplay]].
+        1. Let _secondsValue_ be _duration_.[[Seconds]].
+        1. If _duration_.[[Milliseconds]] is not 0 or _duration_.[[Microseconds]] is not 0 or _duration_.[[Nanoseconds]] is not 0, then
+          1. Set _secondsValue_ to _secondsValue_ + AddFractionalDigits(_durationFormat_, _duration_).
+        1. Let _secondsDisplay_ be _durationFormat_.[[SecondsDisplay]].
+        1. Let _hoursFormatted_ be *false*.
+        1. If _firstNumericUnit_ is *"hours"*, then
+          1. If _hoursValue_ is not 0 or _hoursDisplay_ is not *"auto"*, then
+            1. Set _hoursFormatted_ to *true*.
+        1. If _secondsValue_ is not 0 or _secondsDisplay_ is not *"auto"*, then
+          1. Let _secondsFormatted_ be *true*.
+        1. Else,
+          1. Let _secondsFormatted_ be *false*.
+        1. Let _minutesFormatted_ be *false*.
+        1. If _firstNumericUnit_ is *"hours"* or _firstNumericUnit_ is *"minutes"*, then
+          1. If _hoursFormatted_ is *true* and _secondsFormatted_ is *true*, then
+            1. Set _minutesFormatted_ to *true*.
+          1. Else if _minutesValue_ is not 0 or _minutesDisplay_ is not *"auto"*, then
+            1. Set _minutesFormatted_ to *true*.
+        1. If _hoursFormatted_ is *true*, then
+          1. Append FormatNumericHours(_durationFormat_, _hoursValue_, _signDisplayed_) to _numericPartsList_.
+          1. Set _signDisplayed_ to *false*.
+        1. If _minutesFormatted_ is *true*, then
+          1. Append FormatNumericMinutes(_durationFormat_, _minutesValue_, _hoursFormatted_, _signDisplayed_) to _numericPartsList_.
+          1. Set _signDisplayed_ to *false*.
+        1. If _secondsFormatted_ is *true*, then
+          1. Append FormatNumericSeconds(_durationFormat_, _secondsValue_, _minutesFormatted_, _signDisplayed_) to _numericPartsList_.
+          1. Set _signDisplayed_ to *false*.
+        1. Return _numericPartsList_.
+      </emu-alg>
+    </emu-clause>
+
+    <emu-clause id="sec-listformatparts" type="abstract operation">
+      <h1>ListFormatParts (
+          _durationFormat_: a DurationFormat Object
+          _partitionedPartsList_: a List of Lists of Records,
+          ): a List
+      </h1>
+      <dl class="header">
+        <dt>description</dt>
+        <dd>It creates and returns a List with all the corresponding parts according to the effective locale and the formatting options of _durationFormat_.</dd>
+      </dl>
+      <emu-alg>
         1. Let _lfOpts_ be OrdinaryObjectCreate(*null*).
         1. Perform ! CreateDataPropertyOrThrow(_lfOpts_, *"type"*, *"unit"*).
         1. Let _listStyle_ be _durationFormat_.[[Style]].
@@ -363,26 +476,88 @@ contributors: Ujjwal Sharma, Younies Mahmoud
         1. Perform ! CreateDataPropertyOrThrow(_lfOpts_, *"style"*, _listStyle_).
         1. Let _lf_ be ! Construct(%ListFormat%, &laquo; _durationFormat_.[[Locale]], _lfOpts_ &raquo;).
         1. Let _strings_ be a new empty List.
-        1. For each element _parts_ of _result_, do
+        1. For each element _parts_ of _partitionedPartsList_, do
           1. Let _string_ be the empty String.
           1. For each Record { [[Type]], [[Value]], [[Unit]] } _part_ in _parts_, do
             1. Set _string_ to the string-concatenation of _string_ and _part_.[[Value]].
           1. Append _string_ to _strings_.
-        1. Let _formatted_ be CreatePartsFromList(_lf_, _strings_).
-        1. Let _resultIndex_ be 0.
-        1. Let _resultLength_ be the number of elements in _result_.
-        1. Let _flattened_ be a new empty List.
-        1. For each Record { [[Type]], [[Value]] } _listPart_ in _formatted_, do
+        1. Let _formattedPartsList_ be CreatePartsFromList(_lf_, _strings_).
+        1. Let _partitionedPartsIndex_ be 0.
+        1. Let _partitionedLength_ be the number of elements in _partitionedPartsList_.
+        1. Let _flattenedPartsList_ be a new empty List.
+        1. For each Record { [[Type]], [[Value]] } _listPart_ in _formattedPartsList_, do
           1. If _listPart_.[[Type]] is *"element"*, then
-            1. Assert: _resultIndex_ &lt; _resultLength_.
-            1. Let _parts_ be _result_[_resultIndex_].
+            1. Assert: _partitionedPartsIndex_ &lt; _partitionedLength_.
+            1. Let _parts_ be _partitionedPartsList_[_partitionedPartsIndex_].
             1. For each Record { [[Type]], [[Value]], [[Unit]] } _part_ in _parts_, do
-              1. Append _part_ to _flattened_.
-            1. Set _resultIndex_ to _resultIndex_ + 1.
+              1. Append _part_ to _flattenedPartsList_.
+            1. Set _partitionedPartsIndex_ to _partitionedPartsIndex_ + 1.
           1. Else,
             1. Assert: _listPart_.[[Type]] is *"literal"*.
-            1. Append the Record { [[Type]]: *"literal"*, [[Value]]: _listPart_.[[Value]], [[Unit]]: ~empty~ } to _flattened_.
-        1. Return _flattened_.
+            1. Append the Record { [[Type]]: *"literal"*, [[Value]]: _listPart_.[[Value]], [[Unit]]: ~empty~ } to _flattenedPartsList_.
+        1. Return _flattenedPartsList_.
+      </emu-alg>
+    </emu-clause>
+
+    <emu-clause id="sec-partitiondurationformatpattern" type="abstract operation">
+      <h1>
+        PartitionDurationFormatPattern (
+          _durationFormat_: a DurationFormat,
+          _duration_: a Duration Record,
+        ): a List
+      </h1>
+      <dl class="header">
+        <dt>description</dt>
+        <dd>It creates and returns a List with all the corresponding parts according to the effective locale and the formatting options of _durationFormat_.</dd>
+      </dl>
+
+      <emu-alg>
+        1. Let _result_ be a new empty List.
+        1. Let _signDisplayed_ be *true*.
+        1. Let _numericUnitFound_ be *false*.
+        1. While _numericUnitFound_ is *false*, repeat for each row in <emu-xref href="#table-partition-duration-format-pattern"></emu-xref> in table order, except the header row:
+          1. Let _value_ be the value of _duration_'s field whose name is the Value Field value of the current row.
+          1. Let _style_ be the value of _durationFormat_'s internal slot whose name is the Style Slot value of the current row.
+          1. Let _display_ be the value of _durationFormat_'s internal slot whose name is the Display Slot value of the current row.
+          1. Let _unit_ be the Unit value of the current row.
+          1. If _style_ is *"numeric"* or *"2-digit"*, then
+              1. Append FormatNumericUnits(_durationFormat_, _duration_, _unit_, _signDisplayed_) to _result_.
+              1. Set _numericUnitFound_ to *true*.
+          1. Else,
+            1. Let _nfOpts_ be OrdinaryObjectCreate(*null*).
+            1. If _unit_ is *"seconds"*, *"milliseconds"*, or *"microseconds"*, then
+              1. If NextUnitFractional(_durationFormat_, _unit_) is *true*, then
+                1. Set _value_ to _value_ + AddFractionalDigits(_durationFormat_, _duration_).
+                1. If _durationFormat_.[[FractionalDigits]] is *undefined*, then
+                  1. Let _maximumFractionDigits_ be *9*<sub>𝔽</sub>.
+                  1. Let _minimumFractionDigits_ be *+0*<sub>𝔽</sub>.
+                1. Else,
+                  1. Let _maximumFractionDigits_ be _durationFormat_.[[FractionalDigits]].
+                  1. Let _minimumFractionDigits_ be _durationFormat_.[[FractionalDigits]].
+                1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"maximumFractionDigits"*, _maximumFractionDigits_).
+                1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"minimumFractionDigits"*, _minimumFractionDigits_).
+                1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"roundingMode"*, *"trunc"*).
+                1. Set _numericUnitFound_ to *true*.
+            1. If _value_ is not 0 or _display_ is not *"auto"*, then
+              1. Let _numberingSystem_ be _durationFormat_.[[NumberingSystem]].
+              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"numberingSystem"*, _numberingSystem_).
+              1. If _signDisplayed_ is *true*, then
+                1. Set _signDisplayed_ to *false*.
+                1. If _value_ is 0 and DurationRecordSign(_duration_) is -1, then
+                  1. Set _value_ to ~negative-zero~.
+              1. Else,
+                1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"signDisplay"*, *"never"*).
+              1. Let _numberFormatUnit_ be the NumberFormat Unit value of the current row.
+              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"style"*, *"unit"*).
+              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"unit"*, _numberFormatUnit_).
+              1. Perform ! CreateDataPropertyOrThrow(_nfOpts_, *"unitDisplay"*, _style_).
+              1. Let _nf_ be ! Construct(%NumberFormat%, &laquo; _durationFormat_.[[Locale]], _nfOpts_ &raquo;).
+              1. Let _parts_ be ! PartitionNumberPattern(_nf_, _value_).
+              1. Let _list_ be a new empty List.
+              1. For each Record { [[Type]], [[Value]] } _part_ of _parts_, do
+                1. Append the Record { [[Type]]: _part_.[[Type]], [[Value]]: _part_.[[Value]], [[Unit]]: _numberFormatUnit_ } to _list_.
+              1. Append _list_ to _result_.
+        1. Return ListFormatParts(_durationFormat_, _result_).
       </emu-alg>
 
     <emu-table id="table-partition-duration-format-pattern">
@@ -484,7 +659,7 @@ contributors: Ujjwal Sharma, Younies Mahmoud
 
       <emu-alg>
         1. If NewTarget is *undefined*, throw a *TypeError* exception.
-        1. Let _durationFormat_ be ? OrdinaryCreateFromConstructor(NewTarget, *"%DurationFormatPrototype%"*, &laquo; [[InitializedDurationFormat]], [[Locale]], [[DataLocale]], [[NumberingSystem]], [[Style]], [[YearsStyle]], [[YearsDisplay]], [[MonthsStyle]], [[MonthsDisplay]] , [[WeeksStyle]], [[WeeksDisplay]] , [[DaysStyle]], [[DaysDisplay]] , [[HoursStyle]], [[HoursDisplay]] , [[MinutesStyle]], [[MinutesDisplay]] , [[SecondsStyle]], [[SecondsDisplay]] , [[MillisecondsStyle]], [[MillisecondsDisplay]] , [[MicrosecondsStyle]], [[MicrosecondsDisplay]] , [[NanosecondsStyle]], [[NanosecondsDisplay]], [[FractionalDigits]] &raquo;).
+        1. Let _durationFormat_ be ? OrdinaryCreateFromConstructor(NewTarget, *"%DurationFormatPrototype%"*, &laquo; [[InitializedDurationFormat]], [[Locale]], [[DataLocale]], [[NumberingSystem]], [[Style]], [[YearsStyle]], [[YearsDisplay]], [[MonthsStyle]], [[MonthsDisplay]], [[WeeksStyle]], [[WeeksDisplay]], [[DaysStyle]], [[DaysDisplay]], [[HoursStyle]], [[HoursDisplay]], [[MinutesStyle]], [[MinutesDisplay]], [[SecondsStyle]], [[SecondsDisplay]], [[MillisecondsStyle]], [[MillisecondsDisplay]], [[MicrosecondsStyle]], [[MicrosecondsDisplay]], [[NanosecondsStyle]], [[NanosecondsDisplay]], [[HoursMinutesSeparator]], [[MinutesSecondsSeparator]], [[FractionalDigits]], [[TwoDigitHours]] &raquo;).
         1. Let _requestedLocales_ be ? CanonicalizeLocaleList(_locales_).
         1. Let _options_ be ? GetOptionsObject(_options_).
         1. Let _matcher_ be ? GetOption(_options_, *"localeMatcher"*, ~string~, &laquo; *"lookup"*, *"best fit"* &raquo;, *"best fit"*).
@@ -495,10 +670,19 @@ contributors: Ujjwal Sharma, Younies Mahmoud
         1. Let _r_ be ResolveLocale(%DurationFormat%.[[AvailableLocales]], _requestedLocales_, _opt_, %DurationFormat%.[[RelevantExtensionKeys]], %DurationFormat%.[[LocaleData]]).
         1. Let _locale_ be r.[[locale]].
         1. Set _durationFormat_.[[Locale]] to _locale_.
+        1. Set _durationFormat_.[[DataLocale]] to _r_.[[dataLocale]].
+        1. Let _dataLocale_ be _durationFormat_.[[DataLocale]].
+        1. Let _dataLocaleData_ be _durationFormat_.[[LocaleData]].[[&lt;_dataLocale_&gt;]].
+        1. Let _digitalFormat_ be _dataLocaleData_.[[DigitalFormat]].
+        1. Let _twoDigitHours_ be _digitalFormat_.[[TwoDigitHours]].
+        1. Set _durationFormat_.[[TwoDigitHours]] to _twoDigitHours_.
+        1. Let _hoursMinutesSeparator_ be _digitalFormat_.[[HoursMinutesSeparator]].
+        1. Set _durationFormat_.[[HoursMinutesSeparator]] to _hoursMinutesSeparator_.
+        1. Let _minutesSecondsSeparator_ be _digitalFormat_.[[MinutesSecondsSeparator]].
+        1. Set _durationFormat_.[[MinutesSecondsSeparator]] to _minutesSecondsSeparator_.
         1. Set _durationFormat_.[[NumberingSystem]] to _r_.[[nu]].
         1. Let _style_ be ? GetOption(_options_, *"style"*, ~string~, &laquo; *"long"*, *"short"*, *"narrow"*, *"digital"* &raquo;, *"short"*).
         1. Set _durationFormat_.[[Style]] to _style_.
-        1. Set _durationFormat_.[[DataLocale]] to _r_.[[dataLocale]].
         1. Let _prevStyle_ be the empty String.
         1. For each row of <emu-xref href="#table-durationformat"></emu-xref>, except the header row, in table order, do
           1. Let _styleSlot_ be the Style Slot value of the current row.
@@ -506,7 +690,7 @@ contributors: Ujjwal Sharma, Younies Mahmoud
           1. Let _unit_ be the Unit value of the current row.
           1. Let _valueList_ be the Values value of the current row.
           1. Let _digitalBase_ be the Digital Default value of the current row.
-          1. Let _unitOptions_ be ? GetDurationUnitOptions(_unit_, _options_, _style_, _valueList_, _digitalBase_, _prevStyle_).
+          1. Let _unitOptions_ be ? GetDurationUnitOptions(_unit_, _options_, _style_, _valueList_, _digitalBase_, _prevStyle_, _twoDigitHours_).
           1. Set the value of the _styleSlot_ slot of _durationFormat_ to _unitOptions_.[[Style]].
           1. Set the value of the _displaySlot_ slot of _durationFormat_ to _unitOptions_.[[Display]].
           1. If _unit_ is one of *"hours"*, *"minutes"*, *"seconds"*, *"milliseconds"*, or *"microseconds"*, then
@@ -637,7 +821,12 @@ contributors: Ujjwal Sharma, Younies Mahmoud
 
       <ul>
         <li>[[LocaleData]].[[&lt;_locale_&gt;]].[[nu]] must be a List as specified in <emu-xref href="#sec-intl.numberformat-internal-slots"></emu-xref>.</li>
-        <li>[[LocaleData]].[[&lt;_locale_&gt;]].[[digitalFormat]] must be a Record with keys corresponding to each numbering system available for the given locale and String values containing the appropriate time unit separator for that combination of locale and numbering system.</li>
+        <li>[[LocaleData]].[[&lt;_locale_&gt;]].[[DigitalFormat]] must be a Record with keys corresponding to each numbering system available for the given locale, with Record values containing the following fields:
+          <ul><li>[[HourMinutesSeparator]] is a String value that is the appropriate separator between hours and minutes for that combination of locale, numbering system, and unit when using *"numeric"* or "2-digit" styles</li>
+            <li>[[MinutesSecondsSeparator]] is a String value that is the appropriate separator between minutes and seconds for that combination of locale, numbering system, and unit when using *"numeric"* or *"2-digit"* styles.</li>
+            <li>[[TwoDigitHours]] is a Boolean value indicating whether hours are always displayed using two digits when the *"numeric"* style is used.</li>
+          </ul>
+        </li>
       </ul>
 
           <emu-note>It is recommended that implementations use the locale data provided by the Common Locale Data Repository (available at <a href="http://cldr.unicode.org/">http://cldr.unicode.org/</a>).</emu-note>