Mexico · Legislation
Legislation and primary sources
Where to find the authoritative text of the law in Mexico, and how to confirm it is still in force.
Sources of law, ranked
- Constitution and ratified treaties
- Article 1 gives human-rights treaties constitutional rank; Article 133 makes them supreme law.
- Federal statutes and national codes
- Includes the National Code of Criminal Procedure and the Federal Labour Act.
- State constitutions and codes
- Civil, family and property law is largely state law.
- Jurisprudencia
- Binding precedent: Supreme Court plenary rulings, and since 2021 any reasoned majority holding of the plenary or chambers.
The legislative process
Bills may be introduced by the President, either chamber, state legislatures or by citizens with 0.13% of the electoral roll. Both chambers must pass an identical text; the President may veto, and Congress overrides with two-thirds of each chamber. Constitutional amendments need two-thirds of Congress plus a majority of state legislatures (Article 135).
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