Story perspectives

Milei Threatens UK Arbitration Over Sea Lion Oil Project

By Drooid · Sep 29, 2026, 6:00 AM UTC · How we work

Summary

Story summary

President Javier Milei threatened to sue the United Kingdom over the Sea Lion oil project.
He gave the UK two weeks to halt the project or face arbitration.
Milei warned Argentina would take the case to the International Tribunal for the Law of the Sea after the deadline.
Navitas Petroleum (Israel) and Rockhopper (UK) claim their British licences for the Sea Lion field are valid.

History

Historical Context

The 1994 entry into force of UNCLOS, which created 200-nautical-mile exclusive economic zones and ended the historic three-mile “cannon-shot” rule, gave coastal states rights over offshore resources. Argentina invoked that regime in 2010 with a $2 billion claim against the United Kingdom over Falkland-adjacent drilling. President Javier Milei’s threat to sue the UK and push the case to ITLOS now tests the convention’s dispute-resolution mechanisms.

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Story summary

President Javier Milei threatened to sue the United Kingdom over the Sea Lion oil project.
He gave the UK two weeks to halt the project or face arbitration.
Milei warned Argentina would take the case to the International Tribunal for the Law of the Sea after the deadline.
Navitas Petroleum (Israel) and Rockhopper (UK) claim their British licences for the Sea Lion field are valid.

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