Madrid Law Suspended: What It Means for Companies and Citizens in 2026

Key data

The Community of Madrid approved in April 2026 a law that granted it the capacity to exercise popular action in certain areas. The central Government responded by filing the unconstitutionality appeal no. 5465-2026, arguing that said law invaded state competencies in procedural matters. The Constitutional Court admitted the appeal on September 8, 2026 and, upon invocation of article 161.2 of the Constitution, the law was automatically suspended.

This constitutional mechanism is automatic: when the Government invokes article 161.2 CE when appealing an autonomous law, the suspension operates by operation of law from the admission of the appeal, without the need for the Court to issue an additional precautionary measure. The final resolution of the merits of the case will determine whether the law is constitutional or not and, therefore, whether Madrid can recover that procedural capacity.

What does this regulation establish?

Law 1/2026, of April 15, of the Community of Madrid, enabled this autonomous administration to exercise popular action in certain areas. Popular action is the right to appear as an accuser in a criminal process or as a party in certain administrative proceedings, even if not directly harmed by the fact being tried.

The underlying conflict is jurisdictional: the State considers that regulating who can exercise popular action and under what conditions is a procedural matter that falls exclusively to the state legislator, not to autonomous communities. Madrid, for its part, understood that it had room to expand that capacity in its own territory.

Economic and operational impact

The direct impact is not economic in terms of costs or fees, but rather procedural and strategic. The specific operational consequences are:

• Ongoing proceedings: any process in which the Community of Madrid had appeared as a party exercising popular action under Law 1/2026 remains in a situation of legal uncertainty. The judicial bodies must assess the effect of the suspension on that appearance.
• New actions blocked: Madrid cannot initiate new appearances as popular action under this law while the suspension lasts.
• Uncertainty for third parties: citizens, companies or entities that were parties in proceedings where Madrid acted as popular action must review the procedural status of those files.
• Distribution of competencies: the Constitutional Court's final resolution will set jurisprudence on how far autonomous communities can go in procedural matters, with implications for other regions that may have legislated similarly.

Who does it affect?

• Community of Madrid: temporarily loses the capacity to exercise popular action in the areas enabled by Law 1/2026.
• Public administrations: other administrations that interact with Madrid in judicial or administrative proceedings where it acted as popular action.
• Citizens and companies affected by active proceedings: any natural or legal person who is a party in a process in which Madrid had exercised popular action under this law.
• Law firms and legal advisors: handling cases in which Madrid was appearing as popular action, as they must review the validity of that appearance.
• Other autonomous communities: that may have or be processing similar legislation, as the Constitutional Court ruling will set the limits.

Practical example

Imagine a construction company that has an open criminal proceeding for alleged urban irregularity in Madrid. The Community of Madrid had appeared in that process as popular prosecution, under Law 1/2026, to defend the public interest in urban legality.

As of July 16, 2026, that appearance by Madrid is suspended. The construction company's lawyer must review with the court whether the Community of Madrid's participation as an accusing party remains valid during the precautionary suspension, or whether the court must rule on its continuity in the process. While the Constitutional Court does not resolve the merits, the procedural situation remains in a zone of uncertainty that may affect deadlines and defense strategy.

What should companies do now?

1. Review active proceedings: identify whether in any judicial or administrative process in which you are a party, the Community of Madrid is appearing as popular action under Law 1/2026. If so, consult with your legal advisor about the effect of the suspension.
2. Consult the lawyer in the case: in affected proceedings, the attorney must assess whether the suspension of the law impacts the validity of Madrid's appearance and whether it is appropriate to request clarification from the judicial body.
3. Monitor the Constitutional Court's resolution: the Constitutional Court ruling will determine whether the law is constitutional or not. If it declares it unconstitutional, Madrid will permanently lose that capacity. If it upholds it, the law will regain its validity. This resolution may take months or years.
4. Do not assume that the situation is final: the suspension is precautionary, not an annulment. The law may regain its validity if the Constitutional Court declares it constitutional. Plan alternative scenarios.
5. Monitor whether other autonomous communities have similar legislation: the Constitutional Court ruling will affect the jurisdictional framework of all regions in procedural matters.

Official source

Consult complete regulation in official source

Notice: This article is for informational purposes only and does not constitute legal advice. For specific decisions, consult a qualified professional. Source: https://www.boe.es/diario_boe/txt.php?id=BOE-A-2026-19522