UN confirms Mexico's definitive continental shelf limits in the Gulf

The Commission on the Limits of the Continental Shelf (CLCS) of the United Nations (UN) confirmed the outer limits of Mexico's extended continental shelf in the Eastern Polygon of the Gulf of Mexico, the Secretariat of Foreign Affairs (SRE) reported on November 10, 2026. With the publication of the summary of recommendations, those limits become definitive and binding under the United Nations Convention on the Law of the Sea (UNCLOS).

The process began on December 19, 2011, when Mexico submitted the technical documentation to set the outer edge of its shelf beyond 200 nautical miles. The substantive review started in February 2025, with the establishment of a subcommission; Mexico amended its submission on June 30, 2025, and the subcommission approved its recommendations on February 26, 2026. La Jornada reported that the Commission endorsed them with modifications on July 10 and that the Division for Ocean Affairs and the Law of the Sea circulated the summary on November 10. For the region, the recognition specifies the scope of Mexico's exclusive sovereign rights over the natural resources of the seabed and subsoil, a category that includes hydrocarbons, and respects the maritime delimitations negotiated with the United States and Cuba.

Among the approved technical criteria, the CLCS recommended using 100 fixed geographical points to establish the outer edge of the continental margin in that area and defined the outer limits by means of 10 points connected by straight lines not exceeding 60 nautical miles, according to Aristegui Noticias. The process brought together work from the Legal Counsel of the Foreign Ministry, the National Institute of Statistics and Geography (Inegi), the Secretariat of the Navy (Semar), the Mexican Geological Service and Petróleos Mexicanos (Pemex). The SRE maintained that the resolution reaffirms Mexico's commitment to international law and multilateralism.

The next step is the deposit of the charts and geodetic data that permanently describe the outer limits with the UN Secretary-General, António Guterres, for international publicity. The CLCS summary of recommendations is available with the geographic coordinate tables in its annex.

This article was written with the assistance of artificial intelligence from verified sources and reviewed by a human editor before publication.