Declaration of Entry into Force of the National Code of Civil and Family Procedures in Mexico City

On May 29^th, 2026, the Official Gazette of Mexico City published a decree by the Mexico City Congress establishing that, as of April 1^st, 2027, all civil and family proceedings — including probate matters — will be governed by the National Code of Civil and Family Procedures (Código Nacional de Procedimientos Civiles y Familiares, “CNPCyF”), with supplementary application in asset forfeiture cases.

The decree amends the declaration of entry into force of the CNPCyF in Mexico City.

A. Civil Matters:

Section II: As of April 1^st, 2027, voluntary jurisdiction proceedings, precautionary measures, oral civil enforcement actions, and their appeals will be governed by the CNPCyF (originally scheduled for June 1^st, 2026).
Section III: As of April 1^st, 2027, ordinary oral civil disputes, enforcement proceedings, and other pending case types will also be handled under the CNPCyF (originally scheduled for November 15^th, 2026).
Section IV: As of April 1^st, 2027, the CNPCyF will apply on a supplementary basis to asset forfeiture matters and related laws (originally scheduled for November 15^th, 2026).

B. Family Matters:

Section II: As of April 1^st, 2027, any family proceeding or dispute not already covered under Section I will be governed by the CNPCyF (originally scheduled for June 1^st, 2026).
Section III: As of April 1^st, 2027, testate and intestate probate proceedings will be conducted under the CNPCyF (originally scheduled for November 15^th, 2026).

Transitional Provisions:

The decree takes effect the day following its publication in the Official Gazette.

Summary:

This decree postpones the full implementation of the CNPCyF in Mexico City until April 1^st, 2027 for the majority of civil and family proceedings.
The intent is to provide a transition period for courts, attorneys, and litigants to adapt to the new procedural framework.
Once in force, the CNPCyF will replace local procedural rules in civil and family matters, unifying standards at the national level.