Administrative Code of 1987
Section 9. Power to Propose Constitutional Amendments. -
(1) Any amendment to, or revision of the Constitution may be proposed by: (a) The Congress, upon a vote of three-fourths (3/4) of all its Members; or (b) a constitutional convention. The Congress may, by a vote of two-thirds (2/3) of all its Members, call a constitutional convention, or by a majority vote of all its Members, submit to the electorate the question of calling such a convention.
(2) Amendments to the Constitution may likewise be directly proposed by the people through initiative upon a petition of at least twelve (12) per centum of the total number of registered voters, of which every legislative district must be represented by at least three (3) per centum of the registered voters therein. No amendments under this paragraph shall be authorized within five years following the ratification of the 1987 Constitution nor oftener than once every five years thereafter. The Congress shall provide for the implementation of the exercise of this right.