Initiative to revise the Constitution rests with both the President of the Republic and the Deputies. A project or proposal of revision must be voted-in by the National Assembly with a majority of the two tiers of its members. A revision is only definite after being approved by referendum. No procedure of revision may be engaged in or pursued when it undermines the integrity of the territory. The republican form and the secularity of the State as well as multipartyism may not be made the object of revision.