CHAPTER XV. CONSTITUTIONAL AMENDMENT
ARTICLE 137
This Constitution can only be modified by the National Assembly of People’s Power, by means of resolutions adopted by roll-call vote by a majority of no less than two-thirds of the total number of members; except [where the modification] regards the political, social and economic system, whose irrevocable character is established in Article 3 of Chapter I, and the prohibition against negotiations under aggression, threats or coercion by a foreign power as established in Article 11.
If the modification has to do with the integration and authority of the National Assembly of the People’s Power or its Council of State or involves any rights and duties contained in the Constitution, it shall also require the approval of the majority of citizens with the right to vote by means of a referendum called upon for this purpose by the Assembly itself.
