Climate Change at the ICJ
States have an obligation to take all feasible, appropriate, and precautionary measures to prevent and mitigate climate change.
Obligations of States in Respect of Climate Change, Advisory Opinion of 23 July 2025, ICJ
11KBW is widely recognised as a leading set for public international law. Our barristers have acted in many of the most significant and high profile inter-State cases over the last four decades.
We receive instructions from States, international organisations and other entities, appearing before the International Court of Justice, the International Tribunal for the Law of the Sea and international arbitral tribunals (including under PCA, ICSID, UNCITRAL and ICC rules, and UNCLOS Annex VII tribunals). We understand our clients’ unique needs, whatever the forum. Our barristers are on hand to guide clients through complex and unprecedented problems.
11KBW barristers specialising in public international law hold academic positions at leading universities, including University College London, Harvard Law School, the Sorbonne and King’s College, London. They have published seminal textbooks and journal articles and are frequently appointed to arbitral panels.
States have an obligation to take all feasible, appropriate, and precautionary measures to prevent and mitigate climate change.
Obligations of States in Respect of Climate Change, Advisory Opinion of 23 July 2025, ICJ
The ICJ was asked to rule directly on the authenticity of a treaty in a territorial dispute between Gabon and Equatorial Guinea.
Land and Maritime Delimitation and Sovereignty over Islands (Gabon/Equatorial Guinea) judgment, 19 May 2025, ICJ
The ICJ held that Israel’s continued occupation of the Palestinian Territories is unlawful, that Israel is obliged to end its unlawful actions and all states and organisations have obligations to ensure an end to the occupation.
Legal Consequences Arising from the Policies and Practices of Israel in the Occupied Palestinian Territory, including East Jerusalem Advisory Opinion of 19 July 2024, ICJ
The ICJ held that the United Kingdom’s separation of the Chagos Islands from Mauritius in 1965 was unlawful as it violated the right to self-determination.
Legal Consequences of the Separation of the Chagos Archipelago from Mauritius in 1965 Advisory Opinion of 25 February 2019, ICJ
The ITLOS established the maritime boundary between Mauritius and Maldives within 200 nautical miles, but declined to delimit the continental shelf beyond 200 nautical miles.
Dispute Concerning Delimitation of the Maritime Boundary Between Mauritius and Maldives in the Indian Ocean (Mauritius/Maldives) Judgment of 28 April 2023, ITLOS
Arbitral Award of 3 October 1899 (Guyana v Venezuela).
The ICJ is considering the validity of the 1899 Arbitral Award, which resolved a territorial dispute between the UK and Venezuela.
Judgment of 18 December 2020 on jurisdiction, Judgment of 6 April 2023 on preliminary objections, ongoing, ICJ
The Gambia brings a case to the ICJ alleging that Myanmar’s treatment of the Rohingya breaches the Genocide Convention.
Application of the Convention on the Prevention and Punishment of the Crime of Genocide (The Gambia v Myanmar: 11 States intervening) Judgment of 22 July 2022 on preliminary objections, ICJ
The ILO asked the ICJ to provide an advisory opinion on whether the right to strike is protected by ILO Convention No. 87.
Right to Strike under the ILO Convention No. 87 ICJ
Advisory Opinion on States’ obligations under the UNCLOS to address climate change, including a duty to protect and preserve the marine environment.
Request for an Advisory Opinion Submitted by the Commission of Small Island States on Climate Change and International Law Advisory Opinion of 21 May 2024, ITLOS
The ITLOS determined the maritime boundary between Ghana and Côte d’Ivoire.
Dispute Concerning Delimitation of the Maritime Boundary Between Ghana and Côte D’Ivoire in the Atlantic Ocean (Ghana/Côte D’Ivoire) Judgment of 23 September 2017, ITLOS

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