Argentina is taking its Malvinas sovereignty claim to criminal court for the first time, with a complaint against the companies developing the Sea Lion offshore oil field rather than the British government.
Foreign Minister Pablo Quirno is set to present a criminal complaint against Navitas Petroleum Development & Production, Navitas Petroleum Atlantic United, Navitas Petroleum LP, JHI Associates and Eco (Atlantic) Oil & Gas. Argentina says the complaint can also encompass directors, managers, representatives and other people it believes participated in the conduct under investigation.
La defensa de la soberanía debe ejercerse mediante todas las herramientas jurídicas e institucionales que el Estado Nacional tiene a su alcance.
Translation: "The defense of sovereignty must be exercised through every legal and institutional tool the National State has at its disposal."
Buenos Aires says several of the companies hold licenses granted by the United Kingdom for hydrocarbon exploration or exploitation in the Malvinas North Basin. Argentina argues that those licenses violate Law 26.659, which restricts hydrocarbon activity in areas Buenos Aires considers subject to its sovereignty claim.
Sea Lion lies north of the islands and is being developed by Rockhopper Exploration and Navitas Petroleum. Its potential scale has made offshore hydrocarbons the most consequential economic issue in the sovereignty dispute. If production goes ahead, control of the surrounding resources will be difficult for either side to treat as merely symbolic.
Argentina has already opened administrative sanctions proceedings against 45 individuals and companies linked by the government to unauthorized hydrocarbon activity. Monday's criminal complaint is aimed more directly at companies at the center of the oil project.
President Milei is also tying the sovereignty campaign to military and maritime infrastructure. He has instructed Economy Minister Luis Caputo to prioritize the Integrated Naval Base in Ushuaia, along with other strategic projects, when preparing the 2027 national budget, which is due to reach Congress on September 15.
Ushuaia is one of Argentina's principal gateways to Antarctica and a base for naval activity in the far south. A more capable naval and logistics complex could support maritime surveillance, Antarctic operations and other state activity in waters increasingly important to fishing, shipping and energy policy.
Milei has put the Malvinas at the center of his foreign-policy message since his September 3 national address, while President Trump's recent remarks have raised questions about whether Washington's traditional approach to the dispute could change. There has been no formal US policy reversal.
Britain continues to administer the islands and rejects Argentina's sovereignty claim. The British government also maintains that the islanders have the right to determine their political future, while Argentina insists that the dispute should be resolved through negotiations between the two states.
For the companies involved, the dispute now has a concrete Argentine legal consequence: a company can operate under licenses it considers valid in the Malvinas (Falkland Islands) and still face proceedings in Argentina based on a different assertion of territorial authority.
Nothing announced Monday is a military move against the islands. The strategy runs through criminal law, administrative enforcement, legislation, diplomacy and investment in southern infrastructure.
Congress is expected to receive the sovereignty legislation and the 2027 budget proposals in the coming days.