Falklands Assembly Stays Calm as Argentina Threatens Legal Action Over Oil

Argentina's President Javier Milei told the UN General Assembly on September 29 that Britain has two weeks to halt the Sea Lion oil project in waters near the Falkland Islands or face international arbitration, prompting the Falkland Islands Legislative Assembly to respond that the body remains calm and that there is nothing new in this week's claims.¹⁵

Milei's ultimatum

Milei said he had directed his country's foreign ministry and legal advisers to launch international arbitration proceedings against Britain, which he accused of exploiting Argentine resources through the Sea Lion project. He cautioned that unless Britain halted the activity inside two weeks, Argentina would bring its case before the Hamburg-based tribunal that adjudicates disputes arising from the UN Convention on the Law of the Sea.¹⁵

Milei also used his UN address to criticise the United Nations itself over its handling of the sovereignty dispute. He contended that self-determination is irrelevant in the Falklands' case because, as he sees it, the islanders were settled there rather than being an indigenous population.¹⁵

Argentina's government separately sent a bill to Congress proposing prison terms for resource extraction around the Falkland Islands and opened investigations into companies and executives linked to the oil exploration. Officials said firms active in Falklands oil could be excluded from Argentine projects such as Vaca Muerta.²⁶

Arbitration notified, UK responds

On September 30, Argentina officially informed Britain it was launching an Annex VII arbitration case under the Law of the Sea convention, asking for interim measures that would pause Sea Lion as the dispute is heard. The UK Foreign Office rejected the arbitration request and said the dispute could affect the wider bilateral relationship.⁷

Britain's position was conveyed directly to the Argentine ambassador. Minister Uma Kumaran said, "The Falklands (Malvinas) are British. We will always defend the right to self-determination of islanders," and described Argentina's action as "another effort to threaten the rights and livelihoods of the Falkland people." She added that Britain would keep "standing side by side with the Government of the Falklands and islanders."⁷

According to Argentina, Britain's authorisation of oil exploration breaches a UN resolution calling for restraint on unilateral actions in the disputed territory. The UK, for its part, defends the right of Falkland Islanders to develop their own natural resources and rejects Argentina's sovereignty claim, citing islanders' right to self-determination.²³⁴

The companies and the project

Sea Lion is operated by Israeli firm Navitas Petroleum, which holds a 65 percent stake, and British company Rockhopper Exploration, which holds 35 percent. The field lies in the North Falklands Basin, about 220 kilometres from the islands, and reached a final investment decision with production expected to begin in 2028. The Falkland Islands government has extended the project's licences by five years.²³⁷⁶

Navitas and Rockhopper rejected Argentina's threats, saying, "we have valid exploration licences issued by the UK," and said they expect no change to their production timetable, which still targets first output in the first half of 2028.⁴⁵

In a separate matter, Argentina has charged Thales UK Limited with operating British-registered planes on routes linking the islands to Punta Arenas, Chile, without its permission, prompting Milei to order sanctions, file criminal complaints and pursue diplomatic measures in response.⁵⁶

Falklands reaction

The Falkland Islands Legislative Assembly responded head-on to the renewed campaign, with Ford saying, per MercoPress, that this week's assertions break no new ground and that the territory has kept expanding and prospering. Argentina disputes the islanders' claim to self-determination, arguing the population was not native to the territory.⁵

A 2013 referendum in which, according to Deutsche Welle, 99.8 percent of Falkland Islanders voted to remain a British Overseas Territory with 92 percent turnout is cited by Western outlets as evidence of islander sentiment, though Al Jazeera does not corroborate this figure, leaving the claim contested between sources.²⁴

Historical backdrop

The dispute traces back to the 1982 Falklands War, in which Argentine forces invaded the islands and a British military task force later ejected them. Sources disagree on how long the war lasted—Deutsche Welle puts it at 10 weeks while riotimesonline says 74 days—but both report that it claimed the lives of 649 Argentine troops, 255 British service members and three islanders.¹²⁴⁶

Britain's foreign secretary-equivalent figure cited by the BBC, Wes Streeting, said Argentina lacks the ability to retake the Falklands by force. Al Jazeera reported that US President Donald Trump indicated his administration might reconsider America's long-held neutrality on the Falklands question.¹⁴

Legal uncertainty ahead

According to riotimesonline, should the two nations fail to settle on a venue for emergency relief within the fortnight, the Hamburg-based tribunal could end up being the first to weigh in. The outlet pointed to past cases: in 2012 the tribunal moved swiftly, mandating the release of the Argentine frigate ARA Libertad from detention in Ghana within a month of Argentina's filing, whereas a comparable panel in 2015 chose, by a 3-2 vote, not to take up Mauritius's claim over the Chagos Islands. The outlet noted it remains legally uncertain whether the tribunal would treat the matter as urgent given that the project has yet to produce any oil.⁶

Argentina has not yet published the arbitration notice itself, and Britain had not issued a public response to the two-week deadline as of the report, according to riotimesonline.⁶