Public International Law
Allen & Overy advises national and international corporations, financial institutions, international organisations, governments and States on all contentious and non-contentious aspects of public international law. Our market-leading practice includes specialists in environmental law, regulatory compliance and risk management, dispute resolution, anti-bribery and corruption, anti-money laundering, public law, human rights and sanctions.
A&O’s public international law advisory work includes:
- The drafting and interpretation of international treaties and conventions
- Maritime, territorial and boundary rights
- State succession
- International sanctions regimes
- Privileges and immunities of States and international organisations
- Recognition of States and State succession
- Title to natural resources and international environmental law
- Use of force and international humanitarian law
- Space law
- Trade law
We also advise on contentious Public International Law matters, including State-to-State disputes under public international law, including boundary disputes, and have a market-leading investment treaty arbitration practice.
Our experts have acted as counsel before international courts and special tribunals, such as the Iran-US Claims Tribunal, and advised states on out-of-court strategies for dispute resolution, including before UN fora. We are also one of only a handful of law firms with experience of contentious World Trade Organisation proceedings.
News & insights
Publications: 21 March 2022
International law considerations for foreign investors with business interests in Russia As a result of international sanctions and reputational concerns, many foreign investors with interests in…
Publications: 25 February 2022
In response to the Russian Federation’s formal recognition of two regions in Eastern Ukraine – Donetsk and Luhansk – as independent states, earlier this week the EU and the UK adopted an initial…
Publications: 21 February 2022
Sanctions developments are grabbing headlines around the globe with the spotlight recently focused on Russia and Ukraine and the media dubbing the USA’s potential response “the mother of all…
Publications: 01 November 2021
On 26 October 2021, the Court of Justice of the European Union (the Court) delivered its judgment in Case C‑109/20, Republic of Poland v PL Holdings S.á r.l. (PL Holdings).
Awards and achievements
- Tier One, Public International Law, Legal 500 UK 2019
- Band 1, Dispute Resolution, Global-wide, Chambers Global 2019
- International Arbitration Firm of the Year, Benchmark Litigation Asia-Pacific Awards 2019
- Best Arbitration Team of the Year in Spain and Portugal, 2019
Allen & Overy LLP has superlative expertise across the full spectrum of public international law and related matters… Its 'outstanding and hardworking' team is experienced in state-to-state disputes before the International Court of Justice and tribunals under the jurisdiction of the Permanent Court of Arbitration, ICSID, the United Nations Convention for the Law of the Sea and other ad hoc bodies.
Legal 500 UK 2019, Public International Law
Has a great deal of experience acting for both claimants and respondents in investment treaty disputes…Wins further recognition for its thriving sanctions practice and expert advice on sovereign immunity, Energy Charter Treaty claims, WTO matters and EU law.
Chambers Global 2020, Public International Law
Highly regarded for its expertise in investment treaty arbitrations. Experienced in arbitrations acting both for and against sovereign states and government bodies.
Chambers Asia-Pacific 2020, International Arbitration, China
Highly rated for its skilful handling of investment treaty disputes on behalf of both sovereigns and investors.
Chambers Global 2019, Public International Law
They have a very strong practice and a deep bench of talent.
Chambers Global 2018, Public International Law
International Arbitration Review
Recent developments and emerging trends in international arbitration law and policy