Bilateral Investment Treaties: Real Protection for Investors in Mexico

Regulatory Framework of BITs and Their Application in Mexico

Mexico has entered into more than thirty bilateral investment treaties (BITs) in force, in addition to investment chapters in free trade agreements such as the USMCA and CPTPP. These instruments operate on a plane distinct from domestic law: they create direct obligations of the Mexican State vis-à-vis the foreign investor, regardless of what the national legislation applicable to the specific project provides. For an investor with exposure in the real estate, tourism, or infrastructure sectors in Quintana Roo, understanding the real scope of that layer of protection is a strategic decision, not an academic exercise. However, the concrete scope of that protection varies significantly depending on the applicable treaty, the nationality of the investor, and the corporate structure employed, factors that this article analyzes with the precision required by an informed investment decision.

The constitutional foundation for the reception of these treaties is found in Article 133 of the Political Constitution of the United Mexican States, which establishes the normative supremacy of validly concluded international treaties. Such provision must be read in conjunction with Article 89, Section X, which confers upon the Federal Executive the power to conclude international treaties, and with Article 76, Section I, which attributes to the Senate of the Republic the exclusive competence to ratify them. Each provision fulfills a constitutionally distinct function: Article 89, Section X is the foundation of the Executive’s negotiating power; Article 76, Section I is the source of legislative control over that power through ratification; and Article 133 is the hierarchical norm that determines the place of the ratified treaty within the Mexican legal order. The Foreign Investment Law (published in the DOF on December 27, 1993, with amendments as of August 15, 2018) articulates in Articles 3 and 4 the principles of national treatment and the sectors with reservations or restrictions, but the substantive protection standards applicable to an investor covered by a BIT are, in most cases, more favorable than those provided in that law.

Normative Hierarchy of Investment Treaties

The position of BITs within the Mexican legal order does not equate to constitutional supremacy. Isolated Thesis P. IX/2007, issued by the Plenary of the Supreme Court of Justice of the Nation (Ninth Epoch, Judicial Weekly of the Federation and its Gazette, April 2007), established with clarity a three-level normative hierarchy: the Constitution occupies the apex; validly concluded international treaties are located above ordinary federal legislation; and federal and local laws occupy the lower level. For the foreign investor, this structure has a concrete practical implication: the protection standards contained in a BIT prevail over any contradictory provision of the Foreign Investment Law, of the General Law on Ecological Equilibrium, or of any municipal regulation, but not over the constitutional rights of third parties, including ejidal nuclei with rights to adjoining lands or holders of environmental guarantees constitutionally recognized. This distinction acquires operational relevance when a claim of indirect expropriation by a foreign investor collides with territorial restrictions of constitutional origin, such as those protecting ejidal patrimony or ecological reserve zones based on constitutional Article 27.

Substantive Standards of Protection

The BITs subscribed by Mexico incorporate consistently four central standards that every investor must identify before structuring its operation:

• Fair and equitable treatment (FET): obligates the State not to frustrate the legitimate expectations of the investor at the time of making the investment. Its violation does not require intent; arbitrary, discriminatory, or non-transparent regulatory conduct is sufficient.
• Full protection and security: imposes on the State an obligation of active diligence to prevent harm to the investment, both physical and legal.
• Prohibition of indirect expropriation: covers measures equivalent to expropriation that, without formally transferring title, substantially nullify or depreciate the value of the investment. In the context of the Mexican Caribbean, this encompasses permit cancellations, changes in land use, and restrictions on access to federal zones.
• Most-favored-nation treatment and national treatment: allow the investor to claim conditions no less favorable than those granted to nationals or to investors of third States.

Activation of the Arbitral Mechanism

The mechanism for enforcing these rights is international investment arbitration, typically before the International Centre for Settlement of Investment Disputes (ICSID), before the United Nations Commission on International Trade Law (UNCITRAL), whose 2013 Arbitration Rules are frequently adopted by Mexico’s BITs, or before the International Chamber of Commerce (ICC), when the applicable treaty so provides.

As regards access to ICSID, a relevant technical distinction must be made for purposes of practice. Mexico ratified the Washington Convention of 1965 by decree published in the DOF on August 27, 2018, formally becoming a State party to the ICSID Convention. However, prior to that ratification, Mexico already had access to the mechanism through the ICSID Additional Facility Rules, available for States that are not parties to the main Convention, as demonstrated by the cases Metalclad and Waste Management, both of which were proceedings under that Additional Facility. Additionally, Mexico’s ratification of the Washington Convention in 2018 does not imply that all investment disputes with Mexico are now conducted under the main Convention: the USMCA, analyzed in detail in the following section, maintains its own access rules that limit or condition standard ICSID arbitration for United States and Canadian investors.

The procedure requires, in the generality of Mexican BITs, prior notification of the dispute to the State, followed by a period of consultation or negotiation of between three and six months, before submitting the difference to arbitration. Failure to comply with this procedural requirement may give rise to a preliminary objection to admissibility that the State will invoke without delay. Equally relevant is the fork in the road clause, present in several BITs signed by Mexico: once the investor submits the same dispute to local courts, it may lose the opportunity to resort to international arbitration.

USMCA Chapter 14: Critical Restrictions for United States and Canadian Investors

The USMCA is the most relevant treaty for the majority of investors active in the real estate and tourism market of Quintana Roo, given the predominance of United States and Canadian capital in that market. However, the investor-State dispute settlement regime of Chapter 14 of the USMCA represents a substantial restriction with respect to the regime that existed under Chapter 11 of NAFTA, a fact that frequently surprises investors familiar with the broader protection afforded by the previous treaty.

Under Annex 14-D of the USMCA, applicable to United States and Canadian investors vis-à-vis Mexico, access to international arbitration is conditional on the prior exhaustion of thirty months of local litigation before Mexican courts. This requirement is not a mere procedural formality: it means that the investor must initiate and pursue a contentious-administrative proceeding in Mexico during that period before being able to submit the difference to international arbitration, with the costs, risks of foreclosure, and strategic complexities that this entails. Additionally, Annex 14-D limits the categories of admissible claims to violations of national treatment, most-favored-nation treatment, and expropriation, excluding from arbitration available to United States and Canadian investors the autonomous claim for violation of the fair and equitable treatment standard that is available under the majority of Mexico’s bilateral BITs and under the CPTPP.

By contrast, investors from States with which Mexico maintains vigorous bilateral BITs, such as Spain, Germany, the Netherlands, or France, among others, may access international arbitration with requirements for prior exhaustion that are notably less onerous and with a broader range of substantive standards that may be claimed. This asymmetry makes the planning of corporate structure prior to investment a matter of material legal consequences, not an organizational formality, a point that is developed in the section on practical implications.

For claims arising from investments made during the validity of NAFTA and which fall within the transition period provided for by the USMCA itself, there are transitional law rules that partially preserve access to arbitration under conditions of the previous regime, including the use of UNCITRAL rules. The analysis of applicability of those transitional provisions requires a case-by-case evaluation of the date of establishment of the investment and the nature of the measure being challenged.

Arbitral Criteria Relevant to the Real Estate Sector

International arbitral tribunals have developed criteria that are directly applicable to real estate investments in Mexico. In the matter of indirect expropriation, the sole effects doctrine, which centers the analysis exclusively on the economic impact suffered by the investor, has been the predominant approach in earlier generation BITs that lack explicit regulatory reserve clauses. Nevertheless, the application of one or another standard does not reflect uniform jurisprudential evolution but rather depends, in the first instance, on the text of the specific BIT applicable to the dispute.

BITs executed by Mexico after approximately 2010 tend to incorporate explicit language on proportionality and regulatory police power exception clauses (police powers carve-outs), which recognize the State’s right to regulate in the public interest without such action constituting per se an indemnifiable indirect expropriation. Earlier generation BITs, by contrast, frequently lack those express exceptions, making them more susceptible to analysis centered on the sole effects doctrine. The USMCA and investment commitments under the T-MEC include clauses of this type, while older instruments executed with European States may not contain them. The investor and its legal team must identify the exact text of the applicable treaty before formulating any protection or claim strategy.

The case Metalclad Corporation v. Mexico (ICSID, Case ARB(AF)/97/1, award of August 30, 2000) established that irregular denial of municipal permits may constitute indirect expropriation, a criterion that maintains full force for developers operating in municipalities of the Riviera Maya where land-use authorization depends on discretionary acts of the municipal authority. Regarding the municipal regulatory framework applicable in Quintana Roo, the Municipal Code of the State of Quintana Roo (Decree No. 2, published in the State Official Gazette on August 31, 2001, with amendments through 2024) regulates the discretionary powers of authorization in matters of land use. Given that the 2024 reform may have modified the numbering of specific articles, any reference to concrete provisions of that ordinance must be verified against the current text published in the State Official Gazette of Quintana Roo before its invocation in formal proceedings.

In the sphere of the Fair and Equitable Treatment standard, the case Waste Management, Inc. v. Mexico (ICSID, Case ARB(AF)/00/3, award of April 30, 2004) clarified that state conduct violates the standard when it is arbitrary, grossly unjust, discriminatory, or when it destroys legitimate expectations on which the investor based its decision. This criterion is relevant for investments in federal coastal zones of Quintana Roo, where the action of the Ministry of the Navy and the Ministry of Environment and Natural Resources, in applying the Federal Law of the Sea (DOF, January 8, 1986) and the General Law on Ecological Balance and Environmental Protection (DOF, January 28, 1988, with amendments through 2023), may affect construction permits in beach and mangrove areas.

Interaction with Mexican Law and Domestic Remedies

The exhaustion of domestic remedies is not, as a general rule, a prerequisite condition in modern BITs executed by Mexico, with the structural exception already noted in Annex 14-D of the T-MEC for United States and Canadian investors. However, procedural strategy must contemplate the articulation between international arbitration and Mexican administrative or administrative-contentious proceedings. The Federal Code of Administrative Contentious Procedure (DOF, December 1, 2005, with amendments through 2023) and the Federal Law of Administrative Procedure (DOF, August 4, 1994, with amendments through 2019) offer remedies that, if activated without due strategic coordination, may create procedural bars with direct impact on international arbitration, including activation of the fork in the road clause.

In accordance with Isolated Thesis P. IX/2007 of the Plenary of the Mexican Supreme Court, international investment treaties take precedence over ordinary legislation within the Mexican legal system, which reinforces the position of the foreign investor in invoking higher protection standards than those of domestic law. This hierarchy operates, however, only below the constitutional level: when an investment protection claim collides with rights of constitutional origin, such as ejidal rights under article 27 or environmental guarantees, the treaty’s precedence over ordinary law does not by itself resolve the normative conflict.

Practical Implications for Investors in Quintana Roo

Before structuring a real estate or tourism investment in the Riviera Maya, the investor must verify the existence and content of the BIT applicable to their nationality, identify the dispute resolution clauses, determine whether the corporate structure used meets the requirements of “covered investor” provided for in the treaty, and precisely document the representations and regulatory conditions on which the investment decision was based. This documentation constitutes the raw material of the arbitration case.

The determination of whether a corporate structure qualifies as a “covered investor” under a BIT requires an analysis that goes beyond verifying the country of incorporation of the holding entity. The vast majority of Mexican BITs, and the treaty models adopted by ICSID and UNCITRAL, contain denial of benefits clauses that empower the host State to deny treaty protection to entities that, despite being incorporated in a State party to the treaty, lack substantial business activity in that State or are controlled by nationals of third countries not covered by the instrument. A special purpose company incorporated in the Netherlands or Spain solely to channel an investment into Mexico, without real operational presence in the State of incorporation, may be excluded from the protection of the corresponding BIT if the Mexican State successfully invokes that clause. The arbitral tribunal in Pac Rim Cayman LLC v. Republic of El Salvador (ICSID, Case ARB/09/12) addressed at length the analysis of business substance as a requirement for access to conventional protection, a criterion that tribunals have consistently applied against structures designed primarily to obtain access to investment arbitration without genuine activity in the State of the purported nationality. The risk of denial of benefits is especially relevant for investors planning a holding structure in a European jurisdiction to access a bilateral BIT with Mexico while the actual investment operates through a Mexican entity without substantial counterpart in the jurisdiction of the holding.

The choice of seat and arbitration rules must be made before the dispute, not during. Mexican BITs offer options, but not all are equivalent in terms of cost, duration, and possibility of award recognition. Likewise, the corporate structuring strategy must be validated against the exact text of the invocable treaty before closing the transaction, not at the moment the dispute arises.

Operational Conclusion

BITs confer actionable rights and enforcement mechanisms that operate independently of the Mexican judicial system. Their practical value for an investor in the real estate market of Quintana Roo depends on the quality of the analysis prior to investment, the corporate architecture employed, and the technical capacity of the legal team to activate the mechanisms in timely and proper manner. A favorable international arbitration award against the Mexican State is enforceable in more than 160 jurisdictions under the New York Convention of 1958, to which Mexico acceded by decree published in the DOF on June 22, 1971.

IBG Legal is a firm specialized in international arbitration litigation and structuring of foreign investment in the real estate and tourism sector, with experience in advising on investments in Federal Maritime-Terrestrial Zone concessions and tourism infrastructure projects on the Mexican Caribbean coast. With headquarters in Cancún and offices in Mexico City and Querétaro, our practice integrates coverage analysis under BITs with corporate structuring prior to investment, so that international protection mechanisms are available and operational from the moment the investment is established, not only when the dispute arises. To request a coverage analysis under a BIT specific to your nationality and intended corporate structure, we invite you to contact us before formalizing your investment in the Riviera Maya.

Sources and References

Legislation

• Political Constitution of the United Mexican States, articles 27, 76 section I, 89 section X and 133. Latest amendment published in the DOF on May 28, 2021.
• Foreign Investment Law, articles 3 and 4. DOF, December 27, 1993. Latest amendment: DOF, August 15, 2018.
• Federal Law of the Sea, DOF, January 8, 1986. No subsequent amendments to the publication date.
• General Law on Ecological Balance and Environmental Protection, DOF, January 28, 1988. Latest amendment: DOF, 2023.
• Federal Administrative Procedure Law, DOF, August 4, 1994. Latest amendment: DOF, 2019.
• Federal Code of Administrative Contentious Procedures, DOF, December 1, 2005. Latest amendment: DOF, 2023.
• Municipal Code of the State of Quintana Roo, Decree No. 2. Official Gazette of the State of Quintana Roo, August 31, 2001. Latest amendment: 2024. The provisions relating to discretionary authorization powers regarding land use matters should be consulted in the current text published in the Official Gazette of the State, given that the 2024 amendment may have modified the numbering of specific articles.
• New York Convention on the Recognition and Enforcement of Foreign Arbitral Awards (1958). Mexico’s accession: DOF, June 22, 1971.
• Convention on the Settlement of Investment Disputes between States and Nationals of Other States (Washington Convention, 1965). Mexico’s ratification decree: DOF, August 27, 2018. Prior to that date, Mexico had access to the ICSID Additional Facility as a non-signatory State to the main Convention.
• Treaty between Mexico, the United States and Canada (USMCA), Chapter 14, Annex 14-D. In force since July 1, 2020.

Jurisprudence and Arbitral Criteria

• Isolated Thesis P. IX/2007, Plenary Session of the Supreme Court of Justice of the Nation, Ninth Epoch, Judicial Weekly of the Federation and its Gazette, April 2007. Doctrine of normative hierarchy in three levels: Constitution, international treaties, ordinary federal legislation.
• Metalclad Corporation v. United Mexican States, ICSID, Case ARB(AF)/97/1. Award of August 30, 2000. Criterion on indirect expropriation due to irregular denial of municipal permits. Decided under the ICSID Additional Facility Rules.
• Waste Management, Inc. v. United Mexican States, ICSID, Case ARB(AF)/00/3. Award of April 30, 2004. Operational definition of the fair and equitable treatment standard. Decided under the ICSID Additional Facility Rules.
• Pac Rim Cayman LLC v. Republic of El Salvador, ICSID, Case ARB/09/12. Analysis of business substance and requirements for access to treaty protection in the context of denial of benefits clauses.

Legal Doctrine

• Dolzer, Rudolf and Schreuer, Christoph. Principles of International Investment Law. 2nd ed. Oxford University Press, 2012.
• Newcombe, Andrew and Paradell, Lluís. Law and Practice of Investment Treaties: Standards of Treatment. Kluwer Law International, 2009. Standard reference on the substantive protection standards analyzed in this article.
• Schreuer, Christoph et al. The ICSID Convention: A Commentary. 2nd ed. Cambridge University Press, 2009. Standard reference on the Washington Convention and access mechanisms to ICSID.
• González de Cossío, Francisco. Arbitration. 4th ed. Editorial Porrúa, Mexico, 2021.

Official Sources

• Official Gazette of the Federation (DOF): www.dof.gob.mx
• Official Gazette of the State of Quintana Roo: po.qroo.gob.mx
• Ministry of Economy, General Directorate of Foreign Investment: registration and normative framework of BITs in force. www.economia.gob.mx
• International Centre for Settlement of Investment Disputes (ICSID): case database. icsid.worldbank.org