XX. PROPOSALS TO AMEND THE CONSTITUTION
Section 140. Proposals. The Congress, upon a vote of three-fourth (3/4) of all its Members, may propose amendment(s) to or revision of the Constitution.
Section 141. Form of Proposals and Procedure for Adoption. Proposals to amend or revise the Constitution shall be by resolution which may be filed at any time by any Member. The adoption of resolutions proposing amendments to or revision of the Constitution shall follow the procedure for the enactment of bills.
Section 142. 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.
SOURCE: Committee on Rules