Italy, Tunisia reject Libya sea claim

Italy and Tunisia have put their objections to Libya's central Mediterranean maritime claim on the UN record, sending formal letters against Tripoli's unilateral declaration of an exclusive economic zone. An EEZ gives a coastal state rights over fish, seabed minerals and energy up to 200 nautical miles from shore, but it is not full sovereignty. Until now, only Greece and Cyprus had formally contested the 2019 Turkey-Libya maritime memorandum, a deal drawing boundary lines they say cut across their own claimed waters. Rome and Tunis now bring the opposition to both sides of the sea.

What a UN protest letter can do

Under the UN Convention on the Law of the Sea (UNCLOS), states facing or bordering each other cannot settle overlapping maritime boundaries simply by depositing a line at the UN. Articles 74 and 83 require delimitation by agreement, aimed at an equitable result (UNCLOS full text). The UN records a state's position; it does not endorse it. A unilateral filing cannot bind other states whose rights are affected (UN DOALOS Libya file).

A protest letter puts non-acceptance into the official file. It prevents silence from being treated later as consent, and it tells energy companies, diplomats and courts that the boundary is disputed. According to Pentapostagma, Libya submitted its note on 27 May 2025, Tunisia filed its objection on 19 April 2026 and Italy on 26 May 2026. The exact UN texts have not been independently verified.

The European Council, where EU leaders set the bloc's political direction, said in December 2019 that the Turkey-Libya memorandum "infringes the sovereign rights of third States, does not comply with the Law of the Sea and cannot produce any legal consequences for third States" (European Council conclusions). Italy and Tunisia are now adding their own objections to that earlier EU position, giving it weight from another part of the Mediterranean.

Different countries, different legal ground

Italy and Tunisia are not making the same case. Italy reportedly referred to maritime limits linked to the 1985 International Court of Justice ruling on Libya and Malta's continental shelf (ICJ Libya/Malta case), arguing that Libya's claimed boundaries prejudice Italian rights. For Malta, that reference is not academic: the Libya-Malta case remains one of the legal anchors for how maritime space south of the island is understood.

Tunisia cited its own 1982 ICJ case with Libya (ICJ Tunisia/Libya case). Its objection is framed as the defence of an existing bilateral legal baseline, not as an act of solidarity with Greece or Cyprus.

The politics are different too. Rome is objecting in law while keeping channels open. Italy needs Libya for migration management on the central Mediterranean route and for energy partnerships under Giorgia Meloni's Mattei Plan, which presents Italy as the bridge between North Africa and Europe through gas and infrastructure (Renewable Matter). Tunis objected quietly, while its public diplomacy stressed support for a Libyan-led political solution rather than maritime confrontation (La Presse de Tunisie). The legal filing and the diplomatic tone are not saying the same thing.

The enforcement gap

The objections do not cancel Libya's claim. They make it harder to treat the boundary as settled, but that is not the same as forcing a change in behaviour.

Three limits matter. The UN does not arbitrate maritime boundaries; it keeps the paperwork. Courts need jurisdiction. Turkey, which backs Libya's maritime position, is not a party to UNCLOS and presents its claims through customary international law. Turkey has recently sent its own letters to the UN challenging Greek, Cypriot and Egyptian maritime positions (Greek News on Demand). No court has ruled on the current lines, and UNCLOS dispute-resolution mechanisms cannot be imposed on Ankara without its consent.

The practical test is whether energy companies decide the contested zone is too risky for exploration licences, and whether Libya or Turkey can continue pressing claims through contracts and armed presence off the Libyan coast. Greece, Cyprus, Italy and Malta deepened maritime cooperation at a recent Rome summit (CDE News). France and Italy also endorsed navigation arrangements at Antibes on 25 June that comply with the law of the sea (Élysée joint statement). These are signs of alignment, not enforcement mechanisms.

The legal file against Libya's claim is getting thicker. The enforcement file remains thin.