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Calendar of Events

Case 34 (Nauru Ocean Resources Inc. v. International Seabed Authority) and Case 35 (Tonga Offshore Mining Ltd. v. International Seabed Authority)

The public hearing concluded on 3 July 2026. The Seabed Disputes Chamber will now deliberate on the case. The date for the reading of the Order is tentatively set to Saturday 18 July 2026, at 3 p.m.

At the close of the oral proceedings, the Parties presented their final submissions as follows:

Election of seven Members of the Tribunal

Seven Members of the Tribunal were elected on 18 June 2026 at the thirty-sixth Meeting of States Parties to the United Nations Convention on the Law of the Sea, currently ongoing at the United Nations Headquarters in New York.

President Heidar reports to the Meeting of States Parties to the Convention, noting the Tribunal's growing body of jurisprudence and the submission of three new cases

Judge Tomas Heidar, President of the International Tribunal for the Law of the Sea, addressed the thirty-sixth Meeting of States Parties to the United Nations Convention on the Law of the Sea on 15 June 2026, presenting the Tribunal’s annual report for 2025 and informing delegates about the judicial work, organizational matters and capacity-building activities of the Tribunal since the last Meeting.

Special chamber constituted to deal with the Dispute concerning delimitation of the maritime boundary between Ghana and Togo in the Gulf of Guinea (Ghana/Togo)

By Order of today’s date, the Tribunal has formed a Special Chamber to deal with a dispute concerning the delimitation of the maritime boundary between Ghana and Togo in the Gulf of Guinea.

The M/T “Heroic Idun” (No. 2) Case (Marshall Islands/Equatorial Guinea) - Special Chamber Delivers its Judgment

At a public sitting held today, the Special Chamber of the International Tribunal for the Law of the Sea formed to deal with The M/T “Heroic Idun” (No. 2) Case (Marshall Islands/Equatorial Guinea) delivered its Judgment. The Judgment was read by Judge Hoffmann, President of the Special Chamber.

Visit of the Minister for Foreign Affairs of Iceland to the Tribunal

Judge Tomas Heidar, President of the International Tribunal for the Law of the Sea, received the Minister for Foreign Affairs of the Republic of Iceland, Ms Þorgerður Katrín Gunnarsdóttir, at the Tribunal today. Minister Gunnarsdóttir met with Judge Heidar in the President’s chambers, where she also signed the visitors book.

Secretary-General of the International Seabed Authority visits the Tribunal

Judge Tomas Heidar, President of the Tribunal, welcomed Ms Leticia Reis de Carvalho, Secretary-General of the International Seabed Authority, along with Ms Mariana Durney, Legal Counsel, to the Tribunal today.

The “Zheng He” Case (Luxembourg v. Mexico) - Case Removed from Tribunal’s List

On 16 March 2026, by Order of the President of the Tribunal, Judge Tomas Heidar, The “Zheng He” Case (Luxembourg v. Mexico) was removed from the Tribunal’s List of cases.

ITLOS-Nippon Foundation Capacity-Building and Training Programme on Dispute Settlement under UNCLOS

We welcome applications for the 2026-2027 ITLOS-Nippon Foundation Capacity-Building and Training Programme on Dispute Settlement under UNCLOS until 6 March 2026.

New arbitrator appointed in the arbitral proceedings instituted by Ukraine against the Russian Federation

On 6 February 2026, the President of the International Tribunal for the Law of the Sea, Judge Tomas Heidar, appointed Mr Nguyen Hong Thao (Viet Nam) as arbitrator in the arbitral proceedings instituted by Ukraine against the Russian Federation under Annex VII to the United Nations Convention on the Law of the Sea (PCA Case No. 2019-28, Dispute Concerning the Detention of Ukrainian Naval Vessels and Servicemen (Ukraine v. the Russian Federation)).

Order in The “Zheng He” Case (Luxembourg v. Mexico)

The President, taking into account the agreement of the Parties, extends the time limit for the filing of the Counter-Memorial of Mexico to 16 March 2026.