A Canadian court has reopened a $270 million NAFTA case against Mexico's state-run oil company, Pemex. The case, filed by Mexican oilfield services provider Oro Negro, alleges that PemEX violated the rules of NAFTA and has been reopened after an arbitration tribunal declared itself incompetent to hear the case due to the claimants' Mexican nationality and connection to PemEx. The court also ordered Mexico to pay US $100,000 in legal costs within 30 days. This decision prolongs a high-profile litigation that involves private investors and Mexico's oil and water sector, particularly in disputes related to contracts with Pem Ex. The dispute dates back to the 2013-2017 contractual relationship between Oro Negro and Pemec.