Thailand,

Constitution is the supreme law concerning the administration of government of the country. For Thailand, since King Pra Pokklao Chaoyouhua granted the Constitution for Siam 1932, there have been amendments and promulgationís of Constitution in order for them to be compatible with the changing situations of the country in any period. All the constitutions contain the same principle in maintaining the democratic regime of government with the King as Head of State exercising the legislative power through the National Assembly, the executive power through the Council of Ministers and the judicial power through the courts. The differences are particularly on the status of the National Assembly and the relations between the legislative power and the executive power in order that the constitution is compatible with the situation of the country in each period.

Therefore each constitution and charter contain the different details about the National Assembly as follow:

	1. Temporary Charter for the Administration of Siam Act 1932
	2. The Constitution of the Siam Kingdom 1932.
	3. The Constitution of the Kingdom of Thailand 1946.
	4. The Constitution of the Kingdom of Thailand (Temporary) 1947.
	5. The Constitution of the Kingdom of Thailand 1949.
	6. The Constitution of the Kingdom of Thailand 1912 .
	7. Charter for the Administration of the Kingdom 1959.
	8. Constitution of the Kingdom of Thailand 1968.
	9. Temporary Charter for Administration of the Kingdom 1972.
	10. Constitution for the Administration of the Kingdom 1976.
	11. Constitution for Administration of the Kingdom 1976.
	12. Charter for Administration of the Kingdom 1977.
	13. Constitution of the Kingdom of Thailand 1978.
	14. Charter for Administration of the Kingdom 1991.
	15. The Constitution of the Kingdom of Thailand 1991.
	16. The Constitution of the Kingdom of Thailand 1997. (Copyright of The Council of State of Thailand)