Argentine President Javier Milei has issued a strict two-week ultimatum to the United Kingdom, demanding the cessation of an offshore oil exploration project near the Falkland Islands or facing immediate legal proceedings. The dispute centers on the Sea Lion project, a venture jointly undertaken by British firm Rockhopper Exploration and Israeli company Navitas Petroleum, which both entities assert holds valid extraction licenses.
Setting the deadline on Monday, Milei stated that if the project is not halted, Argentina will file a case with the International Tribunal for the Law of the Sea. Preparations for this “international arbitration” have reportedly been finalized by Argentina’s Foreign Ministry and legal teams. The Argentine president condemned the drilling as an “illegal plundering” of resources on what Argentina considers its continental shelf.
The tension comes amid weeks of escalating rhetoric between the two nations. The Falkland Islands, known in Argentina as the Islas Malvinas, have been a British overseas territory for nearly two centuries, a status rejected by Buenos Aires despite a 2013 referendum in which 99.8% of eligible voters chose to remain under British rule. The estimated 1.7 billion barrels of oil in the Sea Lion field add significant economic stakes to the sovereignty debate.
In response to the threat, a spokesperson for the UK Foreign Office told TIME that the ultimatum was an attempt to deny Falkland Islanders their right to self-determination and economic development. UK Prime Minister Andy Burnham reaffirmed that his government’s support for the islanders’ right to decide their own future is “unwavering.”
Legal experts suggest the two-week period is a procedural requirement before Argentina can seek provisional measures from the tribunal in Hamburg. Marcelo Kohen, a professor emeritus of international law at the Geneva Graduate Institute, explained that if the UK does not comply, both nations will undergo oral hearings before the tribunal decides whether to order a halt to hydrocarbon exploitation. However, Kohen noted that the court has historically declined jurisdiction over territorial sovereignty disputes.
The diplomatic standoff has drawn in the United States. Late last month, President Donald Trump suggested the US is reviewing its neutrality regarding the sovereignty claim, comments Milei seized upon as favorable to Argentina’s position. While Trump later described the situation as a “potential disaster” that he might settle, analysts indicate his remarks do not yet signal a substantive shift in US foreign policy.
Adding to the friction, Milei has been openly critical of the United Nations, labeling it a “useless organization” during his recent address at the General Assembly. Despite this criticism, his administration is now relying on UN-backed legal mechanisms. Earlier in September, Argentina announced sanctions against companies operating in the area and distributed approximately 180 risk assessment notes to entities in 30 countries, alongside filing three criminal complaints involving ten companies.
Wild that Trump’s vague comments were used as diplomatic leverage. Guess every loose tweet is fair game when you’re desperate for an ally.
Does anyone actually think the UK will listen? This ultimatum changes nothing on the ground, just more noise before the hearing.
1.7 billion barrels? That’s a huge economic stake. No wonder both sides are digging in their heels rather than compromising.
The irony of attacking the UN as useless while filing a case with one of its tribunals is truly something else. Hypocrisy at its finest.
A two-week deadline feels like pure theater. The ITLOS route is long and messy; this is all about domestic optics for Milei.