Article 193
The power to initiate amendment of the Constitution is vested concurrently in the President of the Republic upon the proposal of the Cabinet and each Chamber of Parliament upon a resolution passed by a two thirds majority vote of its members.

The passage of a constitutional amendment requires a three quarters majority vote of the members of each chamber of Parliament.
However, if the constitutional amendment concerns the term of the President of the Republic or the system of democratic government based on political pluralism, or the constitutional regime established by this Constitution especially the republican form of the government or national sovereignty, the amendment must be passed by referendum, after adoption by each Chamber of Parliament.
No amendment to this article is permitted.