Critical Nuclear Weapon Design Information (CNWDI)

A DoD category of weapon data designating that Top Secret/Restricted Data or Secret/Restricted Data revealing the theory of operation or design of the components of a thermonuclear or implosion-type fission bomb, warhead, demolition munitions, or test device. Specifically excluded from designation as CNWDI is information concerning:

(1) Arming, fuzing, and firing systems.

(2) Limited-life components.

(3) Total contained quantities of fissionable, fusionable, and high explosive materials by type.

(4) Components which military personnel set, maintain, operate, test, or replace.