Part XI Amendment of the ConstitutionArticle 63
1. Amendments to the Constitution may be proposed either by the President of the Republic or by Parliament.
2. Any proposed amendment made by a member of Parliament shall be signed by at least one-third of the members of either House.
3. Parliament shall meet in congress when called upon to examine a draft or proposed amendment. The amendment shall be adopted by an absolute majority of the members of Parliament. The President of the Republic may request a second reading; in which case the amendment shall be adopted by a two-third Majority of the members of Parliament.
4. The President of the Republic may decide to submit any bill to amend the Constitution to -a referendum; in which case the amendment shall be adopted by a simple majority of the votes cast.Article 64
No procedure for the amendment of the Constitution affecting the republican form, unity and territorial integrity of the State and the democratic principles which govern the Republic shall be accepted.