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

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.