2026 ICC Arbitration Rules: Key changes
The 2026 ICC Arbitration Rules entered into force on 1 June 2026 and will apply to arbitrations commenced on or after that date. The amendments build on the previous 2021 Rules and reinforce the ICC’s focus on efficiency, procedural flexibility, transparency and cost-effectiveness. Whilst impactful, the changes do not fundamentally reshape ICC arbitration. Rather, they introduce targeted reforms designed to streamline proceedings in key areas, while preserving the procedural safeguards and institutional oversight that underpin the ICC’s global reputation. But what is the substance of the latest changes?
1. Terms of Reference no longer mandatory
Perhaps the most significant change in the 2026 Rules is the removal of mandatory Terms of Reference in standard arbitrations. Under the 2021 Rules, the Terms of Reference defined and limited the claims that could be advanced in the arbitration without the tribunal’s permission. They were required to be agreed at an early stage of the arbitration, within 30 days of the tribunal receiving the case file. The Terms of Reference were unpopular with some practitioners, who considered them time-consuming to agree and of limited use in practice. Their removal will bring the ICC into line with the other major arbitral institutions, none of which require terms of reference.
2. New cut-off for new claims
The first case management conference, which the tribunal must hold within 30 days of receiving the case file, will now assume a more significant role. Following the abolition of the Terms of Reference, the conference is now the cut-off point for the introduction of new claims without the tribunal’s permission. Parties thus remain required to set out their cases in full at an early stage.
3. New early determination mechanism
The Rules now expressly permit the tribunal to dispose of claims or defences at an early stage where they are manifestly either without merit or outside its jurisdiction. While tribunals arguably already possessed this power, the new rule resolves any doubt on the matter. The rule is intended to improve efficiency by avoiding time and money being spent on clearly unmeritorious cases. The change brings the ICC rules in line with other arbitral institutions, which have included similar provisions in recent revisions to their rules.
4. Expanded expedited and emergency procedures
The 2026 Rules contain a number of changes pushing parties towards faster and more streamlined proceedings where appropriate.
The threshold for automatic opt-in to the ICC’s expedited procedure, whereby disputes are generally determined by a sole arbitrator without an oral hearing, is increased to US$4 million, provided the arbitration agreement was concluded on or after 1 June 2026.
In addition, the Rules introduce Highly Expedited Arbitration provisions as an additional opt-in mechanism for the most straightforward disputes. These provisions are based on the expedited procedure but are even more streamlined, for example, requiring the parties to submit their Statement of Claim or Defence alongside their Request for Arbitration or Answer.
The emergency arbitration provisions, which provide a mechanism for seeking urgent relief before the tribunal is constituted, have also been clarified and expanded. For example, ex parte (i.e., without notice) applications are now expressly permitted, catering for scenarios (for example, asset dissipation) where notice to the other party would frustrate the purpose of the application. Orders may now also be sought against “any party for which the President is satisfied, on a prima facie basis, that a binding arbitration agreement exists”, thereby expanding the regime to include parties who have become parties to the arbitration agreement alongside its original signatories.
5. Greater emphasis on disclosure, digital procedure and award management
The 2026 Rules modernise several aspects of the arbitral process. They reinforce disclosure obligations for arbitrators by expressly stating that any doubt should be resolved in favour of disclosure, while also clarifying that disclosure does not in itself establish a lack of independence or impartiality. Parties are additionally required at the outset to identify relevant persons and entities for conflict-checking purposes.
More broadly, the Rules make electronic communications the default, support remote and hybrid hearings, allow digital award formalities and revise the framework for setting and extending the time limit for the final award.
Conclusion
Overall, the 2026 ICC Arbitration Rules are evolutionary rather than revolutionary. They preserve the core structure of ICC arbitration while enhancing the ability of parties to resolve disputes efficiently, flexibly and proportionately in light of the issues and the value in dispute.
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