Article 85 Political Constitution of the United Mexican States
Third Title · Chapter III. On the Executive Power
Current text · last reform published in the Official Gazette of the Federation (DOF) on 2 June 2026
If before beginning a constitutional period the election is not made or declared valid, the President whose period has concluded shall cease, and the person designated by the Congress in the terms of the preceding article shall be interim president.
If at the beginning of the constitutional period there is absolute absence of the President of the Republic, the President of the Senate shall provisionally assume the office, while the Congress designates the interim president, in accordance with the preceding article.
When the President requests leave to separate from the office for up to sixty calendar days, once authorized by the Congress, the Secretary of the Interior shall provisionally assume the office of the Executive Power.
If the temporary absence becomes absolute, the procedure provided in the preceding article shall be followed.