Article 71 Political Constitution of the United Mexican States
Third Title · Chapter II. On the Legislative Power · Section II. On the Initiative and Formation of the Laws
Current text · last reform published in the Official Gazette of the Federation (DOF) on 2 June 2026
The right to initiate laws or decrees corresponds:
I.To the President of the Republic;
II.To the Deputies and Senators to the Congress of the Union;
III.To the Legislatures of the States and of Mexico City; and
IV.To the citizens in a number equivalent, at least, to zero point thirteen percent of the nominal list of electors, in the terms indicated by the laws.
The Law of the Congress shall determine the procedure that must be given to the initiatives.
On the day of the opening of each ordinary period of sessions the President of the Republic may present up to two initiatives for preferential procedure, or designate with such character up to two that he has presented in previous periods, when they are pending ruling. Each initiative must be discussed and voted by the Plenary of the Chamber of its origin within a maximum term of thirty calendar days. If it is not so, the initiative, in its terms and without further procedure, shall be the first matter that must be discussed and voted in the following session of the Plenary. In case of being approved or modified by the Chamber of its origin, the respective bill of law or decree shall pass immediately to the reviewing Chamber, which must discuss it and vote it in the same term and under the conditions indicated above.
The initiatives of addition or amendment to this Constitution may not have preferential character.