Article 14 Political Constitution of the United Mexican States
First Title · Chapter I. On Human Rights and Their Guarantees
Current text · last reform published in the Official Gazette of the Federation (DOF) on 2 June 2026
No law shall be given retroactive effect to the detriment of any person.
No one may be deprived of their liberty or of their properties, possessions or rights, except by means of a proceeding followed before the previously established courts, in which the essential formalities of the procedure are fulfilled and in accordance with the Laws issued prior to the act.
In the proceedings of the criminal order it is prohibited to impose, by simple analogy, and even by majority of reason, any penalty that is not decreed by a law exactly applicable to the crime in question.
In the proceedings of the civil order, the final judgment (sentencia) must be in accordance with the letter or the legal interpretation of the law, and in the absence of this it shall be founded on the general principles of law.