Odyssey Marine Exploration, Inc. v. United Mexican States, ICSID Case No. UNCT/20/1
ICSID · Investment (ICSID and treaty) · Mexico · 17 Sep 2024
Why it matters
This case is a landmark NAFTA investment arbitration where the tribunal held Mexico liable for a politically motivated denial of an environmental permit, awarding US$37.1 million. It reinforces that environmental decisions must be based on law and science, not political interference, and clarifies the limits of state discretion under investment treaties.
Summary
Odyssey Marine Exploration, a US company, invested in a phosphate mining project off the coast of Baja California Sur, Mexico, through its Mexican subsidiary ExO. In 2016, Mexico's environmental agency SEMARNAT denied ExO's environmental permit. Mexico's highest federal administrative court (TFJA) ruled in 2018 that the denial was unlawful. However, SEMARNAT again denied the permit, prompting Odyssey to file a NAFTA Chapter Eleven arbitration at ICSID. The tribunal found that Mexico breached its NAFTA obligations by arbitrarily and discriminatorily denying the permit based on a political directive rather than on Mexico's environmental regulations or scientific evidence. The award ordered Mexico to pay US$37.1 million in damages, plus interest from October 12, 2018, compounded annually at the one-year Mexico Treasury bond rate, and to bear the arbitrators' fees and ICSID administrative costs. The award is net of Mexican taxes. Odyssey expects the proceeds to satisfy litigation financing obligations. The case highlights the tension between state sovereignty over environmental regulation and investor protections under investment treaties.
The detail
Parties: Odyssey Marine Exploration, Inc. v. United Mexican States, ICSID Case No. UNCT/20/1
Case number: italaw/cases/7261
Outcome: Mexico ordered to pay US$37.1 million for breaching NAFTA obligations, plus interest from October 12, 2018, and arbitrators' fees and ICSID costs.
Quantum: US$37.1 million
Applicable law: NAFTA Chapter Eleven; ICSID Additional Facility Rules; Mexican environmental law
Issues in play: NAFTA's fair and equitable treatment and expropriation provisions collided with Mexico's sovereign right to deny environmental permits. The tribunal found that SEMARNAT's denial was arbitrary and discriminatory, not based on regulations or science but on a political directive.
Read the full decision at italaw ↗
Locus Standi links to the source decision and publishes its own plain-language summary. It does not reproduce the text of the award.