Category: Dispute resolution · Reviewed by Jake Leat, Associate Director · Last reviewed 2026-06-11
ARIAS is the family of national bodies established under the auspices of AIDA (the International Insurance Law Association) to promote arbitration as the preferred mechanism for resolving (re)insurance disputes, of which ARIAS UK is the London-based chapter.
Category: Dispute resolution Also known as: AIDA Reinsurance and Insurance Arbitration Society, ARIAS, Arbitration: Insurance and Reinsurance Society (UK) Limited Related concepts: ARIAS UK, Insurance arbitration, Insurance dispute, Coverage litigation
ARIAS, formally the AIDA Reinsurance and Insurance Arbitration Society, is the umbrella name used by a network of national societies dedicated to the promotion, regulation and improvement of arbitration in the international insurance and reinsurance markets. Each national chapter is constituted under its local laws but operates within the AIDA framework, sharing the common purpose of supporting arbitration as the preferred forum for resolving (re)insurance disputes.
The ARIAS network includes ARIAS UK, ARIAS US, and chapters in continental Europe and elsewhere. Each national chapter maintains its own membership, code of conduct, panel of approved arbitrators and arbitration rules. They are united by a shared institutional heritage with AIDA, the Association Internationale de Droit des Assurances (International Insurance Law Association), the global learned society for insurance law founded in 1960.
Functionally, ARIAS chapters do not themselves administer arbitrations in the manner of the LCIA or ICC. Rather, they provide three principal services: maintaining lists of qualified arbitrators, publishing model rules and clauses, and supporting professional development through training, conferences and accreditation.
ARIAS chapters are not regulators in the public-law sense. They are private associations whose authority derives from contract: parties incorporate ARIAS rules and clauses into their (re)insurance contracts, thereby agreeing that the rules will govern any arbitration between them. The underlying legal framework is the arbitration legislation of the seat: in England, the Arbitration Act 1996; in the United States, the Federal Arbitration Act; in other jurisdictions, the relevant national legislation, frequently based on the UNCITRAL Model Law.
ARIAS arbitrators owe their public-law duties (impartiality, fairness, the duty to disclose) to the parties under the governing legislation, not to ARIAS itself. ARIAS codes of conduct supplement these duties with profession-specific expectations on independence, conflicts management and continuing professional development. Breach of a code may lead to expulsion from the ARIAS panel but does not in itself invalidate an award; the proper procedural challenge route is via the relevant arbitration statute.
In England, ARIAS UK is incorporated as a company limited by guarantee, Arbitration: Insurance and Reinsurance Society (UK) Limited. Its constitutional documents, board governance, membership criteria and disciplinary processes are matters of company and contract law rather than financial regulation. The Financial Conduct Authority does not regulate ARIAS UK or its activities, as arbitration of insurance disputes is outside the FCA’s regulatory perimeter.
Members of ARIAS chapters include arbitrators, lawyers, brokers, underwriters and claims professionals active in (re)insurance dispute resolution. Each chapter operates a tiered membership structure, with the senior tier comprising accredited or certified arbitrators eligible for inclusion on the panel from which appointments are made.
In practice, a (re)insurance contract incorporating an ARIAS clause provides for disputes to be referred to arbitration under the relevant chapter’s rules. The parties typically each nominate an arbitrator from the panel; the two party-nominated arbitrators then agree a chair, or the chapter appoints one in default. The arbitration proceeds under the chapter’s rules, supplemented by the parties’ agreement and the supervisory provisions of the relevant arbitration statute.
ARIAS UK in particular publishes a suite of model clauses for direct insurance and reinsurance use, as well as fast-track procedures for smaller disputes. Its arbitrator panel includes lawyers, former regulators, retired judges, underwriters and claims executives. Appointments are made on application, subject to satisfaction of criteria including qualification, experience, training and a clean disciplinary record.
ARIAS chapters cooperate on cross-border matters, particularly where reinsurance disputes have transatlantic dimensions. Cross-membership is permitted, with senior practitioners often belonging to both ARIAS UK and ARIAS US.
ARIAS UK is the London chapter, founded in 1991 as Arbitration: Insurance and Reinsurance Society (UK) Limited. Its rules are widely used in the London market.
ARIAS US is the United States chapter, founded in 1994 and headquartered in New York. It maintains its own rules and panels, with substantial activity in reinsurance and excess and surplus lines disputes.
ARIAS chapters in continental Europe include affiliates active in the Spanish-, French-, German- and Italian-speaking markets, each adapted to local procedural and substantive law.
AIDA, the parent body, conducts work that extends beyond arbitration: AIDA’s working parties address comparative insurance law, consumer protection, climate change and risk, and other topics. Conference proceedings and working papers are an important source of comparative analysis for cross-border insurance disputes.
Distinguish from other institutions: the LCIA, ICC and SCC are general commercial arbitral institutions that administer cases across all sectors, including (re)insurance, but lack the sectoral specialism. The Chartered Institute of Arbitrators is a UK-headquartered global professional body for arbitrators across all sectors. ARIAS occupies the niche of sector-specific bodies focused exclusively on (re)insurance.
A Bermuda reinsurer and a London-market cedant enter a 24-month quota share treaty governed by English law. The treaty contains an arbitration clause specifying London seat, ARIAS UK Arbitration Rules 2022, a three-member tribunal and party-nominated arbitrators drawn from the ARIAS UK panel. Following a dispute on the application of an ultimate net loss clause, the cedant serves notice of arbitration.
Each party nominates a panel arbitrator from ARIAS UK’s list of accredited arbitrators. The two nominees confer and propose a chair, who accepts after providing a section 33 disclosure on potential conflicts. The arbitration proceeds under the ARIAS UK 2022 Rules and the Arbitration Act 1996. ARIAS UK itself plays no administrative role in the conduct of the reference, but the parties have the benefit of its panel, code of conduct and procedural rules. The award is rendered, paid and the file closed; ARIAS UK has provided the institutional scaffolding without intervening in the substantive process.
This entry is part of the Apex Insurance Wiki. Last reviewed by Matt Bartlett on 2026-06-11. Next review: 2026-12-11.
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