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United Kingdom
Key definition
Arbitration definition

What does Arbitration mean? Arbitration is a private process where parties resolve disputes by one or more arbitrators who issue a final, binding award instead of a court judgment. It is consensual, usually agreed by an arbitration clause, and the law of the seat governs the procedure (lex arbitri). In England and Wales and Northern Ireland, the Arbitration Act 1996 applies. Courts stay court proceedings in favour of arbitration, provide support, and enforce awards; challenges are limited to lack of jurisdiction (s.67), serious irregularity (s.68) and, unless excluded, appeal on a point of law (s.69). In Scotland, the Arbitration (Scotland) Act 2010 provides a similar...

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Portugal: State immunity and arbitration—customary law, ius imperii/ius gestionis distinction, recognition of investment awards, enforcement immunity, and burden of proof

Practice notes
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This Practice Note explores the place of state immunity in connection with Arbitration proceedings in Portugal. For a broad primer on state immunity and arbitration, see Practice Note: State immunity and arbitration—general considerations. Additionally, for Practice Notes covering state immunity across a range of jurisdictions worldwide (including England and Wales), consult our ‘State immunity’ subtopic: State immunity and arbitration—overview.

State immunity in Portugal

State immunity is not a rule of law presently operating within the Portuguese legal order. Indeed, there is no explicit statutory norm enacting the maxim ‘Par in parem non habet judicio’ (state immunity). While Portugal is a party to the United Nations Convention on Jurisdictional Immunities of States and their Property, adopted in New York on 17 January 2005 (Portugal acceded to the New York Convention on State Immunity by Decree of the President of the Portuguese Republic No 57/2006 of 20 June 2006, which took effect on 14 September 2006), that international instrument has not yet entered into force. Portugal is also party to the Vienna Convention on Diplomatic Relations of 1961 and the Vienna Convention on Consular Relations of 1963, but they have limited scope as far as the immunity...

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Duarte G Henriques
Duarte G Henriques

Duarte Henriques is a lawyer and arbitrator based in Lisbon - Portugal. Since 1990, he has acted as both counsel and arbitrator in a number of litigation and arbitration cases related to investment disputes, banking & finance, corporate, commercial, distribution and construction disputes. Duarte Henriques has a strong experience in advising and securing “third-party funding” for clients.Duarte Henriques advises major banking and finance institutions, insurance companies, companies in the energy sector, bio-pharmaceutical companies, and technology / software solution providers in litigation and arbitration disputes.Duarte Henriques has also a solid experience in the transactional practice. He regularly advises clients in matters related to corporate law, mergers and acquisitions / joint ventures, construction, commercial law (including distribution, franchising, and licensing), labour law, procurement, and real estate (see list of relevant matters attached).Duarte Henriques is listed as arbitrator in a number of...

Web page updated on 21/05/2026

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