## Facts

- Ten deputies (a qualified minority) of the Congress of Colima filed an *acción de inconstitucionalidad* challenging parts of Colima’s expropriation framework.
- The challenged norms were provisions of the State of Colima’s Expropriation Act and related provisions in Colima’s Organic Law of Public Administration.
- Colima’s Expropriation Act described expropriation as the state dispossessing an owner for the public interest in exchange for fair compensation, but it did not define what “public interest” meant.
- The Colima legislature identified categories said to serve the public interest, including economic-development aims such as creating and supporting businesses that serve the state, developing industrial parks, and encouraging tourism projects (including tourism zones referenced in the state’s development planning).
- The deputies alleged that leaving “public interest” undefined, while authorizing expropriations tied to business and tourism initiatives, conflicted with Article 27 of the Federal Constitution because it could allow takings that chiefly benefit private parties rather than the community.
- The deputies also alleged the government intended to use the statutory scheme to carry out a development plan focused on tourism zones throughout Colima.
- The Supreme Court of Justice of the Nation (SCJN), sitting as the Plenum, took jurisdiction under the constitutional mechanism for abstract review of norms and received submissions from the Colima authorities and the federal Attorney General.
- The case was decided by a nine-justice majority, with two dissenting justices (José Ramón Cossío Díaz and José de Jesús Gudiño Pelayo). The reporting justice was Juan N. Silva Meza.

## Issues

1. Whether Colima’s expropriation provisions violated Article 27 of the Mexican Constitution by failing to define “public interest” and by authorizing expropriation for broad economic-development purposes such as tourism, business creation, and industrial parks.
2. Whether expropriation statutes are unconstitutional when they allow takings that may deliver significant benefits to private enterprises, even if the state asserts a public aim.
3. Whether the challenged norms provided sufficient constitutional limits and safeguards (public interest, procedure, and compensation) to prevent arbitrary or privately directed dispossession.

## Decision

- The SCJN Plenum held the challenge well taken in part and rejected it in part.
- The Court ruled that state expropriation legislation must conform to the federal constitutional property regime in Article 27, including the requirement that expropriation be justified by a constitutionally valid public interest and accompanied by indemnification and legally required process.
- The Court invalidated certain portions of the challenged framework to the extent they conflicted with those federal constitutional requirements, including where the statutory design failed to supply adequate legal limits on the use of expropriation powers.
- The Court upheld other portions of the scheme where, properly understood, they could operate within Article 27’s boundaries—recognizing that economic-development objectives can, in some circumstances, qualify as public interest when structured and carried out with constitutionally sufficient safeguards.
- The judgment had general effect as an abstract constitutional ruling, rather than resolving the legality of any particular expropriation decree or specific taking.

## Legal Principles

- Expropriation is constitutionally permissible only when grounded in a valid public interest (public utility), carried out through legally required procedures, and paired with indemnification as required by Article 27.
- States may legislate on expropriation, but they cannot reduce or contradict the minimum federal constitutional guarantees that control the institution of expropriation across the federation.
- A statutory grant of expropriation authority must include workable legal standards that meaningfully channel state action; norms that leave the triggering public-interest basis too indeterminate, or that permit excessive discretion without sufficient constraints, are vulnerable in abstract review.
- The fact that private parties may benefit from an expropriation-linked project does not automatically eliminate the public-interest character of the measure; the controlling inquiry is whether the primary aim and legal structure are genuinely public and constitutionally regulated.
- In an *acción de inconstitucionalidad*, the SCJN may strike unconstitutional norms with erga omnes effect when the required qualified majority is met, leaving concrete disputes over specific expropriation acts to case-specific proceedings.

## Conclusion

In *Action of Unconstitutionality 18/2004*, the SCJN Plenum reviewed Colima’s expropriation statutes against Article 27 and concluded that, while states may identify public-interest purposes that include certain economic-development goals, the constitutional validity of such laws depends on providing legally sufficient standards and safeguards; the Court therefore invalidated some provisions that fell short of federal constitutional limits and upheld others capable of operating within those limits.


Action of Unconstitutionality, Action of Unconstitutionality 18/2004 (2004)