On 1 June 2026, the revised ICC Arbitration Rules entered into force. The update comes at a time when ICC Arbitration continues to strengthen its position as one of the world's leading dispute resolution frameworks.
According to the 2025 International Arbitration Survey conducted by Queen Mary University of London in partnership with White & Case, the ICC Arbitration Rules emerged as the preferred set of arbitral rules across nearly every region (with only the exception of Asia-Pacific, where the ICC ranks third after HKIAC and SIAC), underlining both their global reach and their flexibility.
The revision also follows a period of continued growth for ICC Arbitration. In 2025, 881 new cases were filed under the ICC Arbitration Rules, placing the year among the three busiest years in the institution's history. At year end, a record 1,869 cases remained pending. In December 2025, the ICC Court reached another milestone by registering its 30,000th arbitration under the ICC Rules.
The scale of ICC Arbitration is further illustrated by the value of disputes administered by the institution. According to the 2024 ICC Dispute Resolution Statistics, the total value of pending cases reached US$354 billion, representing the highest aggregate caseload value ever recorded by the ICC.
Against this background, the 2026 revision was not intended to fundamentally reshape ICC Arbitration. Instead, the 2026 Rules continue the ICC's longstanding approach of refining existing mechanisms, expanding procedural options and adapting to evolving commercial realities.
The 2026 Rules further strengthen the ICC's commitment to efficient dispute resolution by refining two mechanisms that have become increasingly important in practice: the Expedited Procedure Provisions ("EPP") and Emergency Arbitration.
The overall structure of the EPP, now governed by Article 32 and Appendix V, remains unchanged. Proceedings continue to benefit from a sole arbitrator by default, shortened procedural timetables and lower costs than ordinary ICC arbitrations.
The principal amendment is the increase of the monetary threshold for automatic application from US$3 million to US$4 million for arbitration agreements concluded on or after 1 June 2026.
The revised threshold reflects both the growing value of international commercial disputes, and the confidence users have developed in expedited proceedings since their introduction in 2017. By the end of 2025, the ICC had administered more than 1,000 expedited cases, and more than 40% of cases filed in 2025 involved amounts below US$4 million.
Party autonomy remains fully preserved: parties may opt out of the EPP even where the threshold is met or agree to apply it to substantially larger disputes.
The 2026 Rules also introduce targeted amendments to the Emergency Arbitration provisions contained in Article 31 and Appendix IV.
Most notably, emergency applications may now be brought not only against signatories and their successors, but also against parties for whom the President of the ICC Court is satisfied that an arbitration agreement may exist. The amendment reflects the increasingly complex structures of modern commercial transactions and seeks to ensure that access to urgent relief is not unnecessarily restricted.
Another significant innovation is the express recognition of preliminary orders. Emergency arbitrators are now expressly authorised to issue orders aimed at preventing a party from frustrating the purpose of an emergency application.
Where necessary, such orders may be granted without prior notice to the opposing party, for example where advance notice could result in asset dissipation or the destruction of evidence. At the same time, the Rules preserve due process by ensuring that affected parties are subsequently given an opportunity to present their case and by empowering the emergency arbitrator to modify or revoke the order.
These amendments align the ICC Rules more closely with other leading arbitration frameworks and enhance the effectiveness of urgent interim relief.
The independence and impartiality of arbitrators remain among the cornerstones of ICC Arbitration. Accordingly, the 2026 Rules devote particular attention to the disclosure framework contained in Article 12.
The substantive disclosure standard itself remains unchanged. Prospective arbitrators continue to be required to disclose circumstances that may call into question their independence or give rise to reasonable doubts as to their impartiality.
However, the Rules now incorporate several principles that had previously been reflected mainly in the ICC Note to Parties and Arbitral Tribunals (a guide on how to implement the arbitration rules in practice). Article 12(2) expressly provides that any doubts regarding whether a circumstance should be disclosed must be resolved in favour of disclosure, while Article 12(4) clarifies that disclosure alone does not establish a lack of independence or impartiality.
Another important innovation is Article 12(5), which requires each party to provide the Secretariat at the outset of the proceedings with a list of persons and entities that prospective arbitrators should consider for conflict purposes, together with the reasons for their inclusion.
The 2026 Rules also strengthen the position of tribunal secretaries. Tribunal secretaries are now subject to the same requirements of independence, impartiality and confidentiality as arbitrators and must sign a statement of acceptance, availability, impartiality and independence before their appointment. This development acknowledges the increasingly important role tribunal secretaries play in modern arbitral proceedings.
Another important development under the 2026 Rules is the express introduction of Early Determination in Article 30.
Although not new, early determination had previously existed primarily through arbitral practice and the ICC Note to Parties and Arbitral Tribunals, which since 2017 has guided tribunals in disposing of manifestly unmeritorious claims or jurisdictional objections.
In response to feedback from users and the wider business community, the ICC has now incorporated this mechanism directly into the Rules, thereby removing any remaining uncertainty regarding a tribunal's authority to employ it.
Under Article 30, any party may request the early determination of one or more claims or defences on the grounds that they are manifestly without merit or manifestly outside the tribunal's jurisdiction. The tribunal retains broad discretion both as to whether the application should proceed and how the procedure should be organised.
Applications are expected to be made promptly, as those brought only after extensive submissions or document production are less likely to achieve their intended purpose.
Early determination is likely to be most effective where issues can be decided as a matter of law and without extensive evidentiary analysis. Its codification brings the ICC Rules into line with a broader trend among leading arbitral institutions, including SIAC, HKIAC and the SCC.
At the same time, the requirement that claims be "manifestly" without merit suggests that Early Determination will remain an exceptional tool rather than a substitute for full merits proceedings.
One of the most notable procedural changes introduced by the 2026 Rules concerns the traditional Terms of Reference.
For decades, the Terms of Reference represented one of the defining features of ICC Arbitration, serving to confirm consent to arbitrate, record procedural agreements and identify the scope of the dispute. Over time, however, these functions became less significant as international arbitration evolved.
Under previous versions of the Rules, tribunals were required to prepare the Terms of Reference within 30 days after receiving the file. In practice, extensions were frequently granted, and many users increasingly regarded the process as adding costs and procedural complexity without materially narrowing the issues at such an early stage.
The Terms of Reference have been abolished as an instrument altogether, which does not, however, preclude the tribunal and the parties to the arbitration from agreeing on such.
The amendment builds on the ICC's experience with expedited proceedings introduced in 2017. In more than 1,000 expedited cases administered to date, only a small number of tribunals considered Terms of Reference necessary.
The reform places greater emphasis on early case management. The initial Case Management Conference under Article 24 now becomes the central procedural milestone in the arbitration. Following that conference, no party may introduce new claims without the tribunal's authorisation.
Another consequence concerns the timing of awards. Article 34 now allows the President of the ICC Court to determine and extend time limits by reference to the procedural timetable established in the case.
Perhaps the most visible innovation of the 2026 Rules is the introduction of the Highly Expedited Arbitration Provisions ("HEAP"), first referred to in Article 33 and further set out in Appendix VI.
Building on Emergency Arbitration (2012) and the Expedited Procedure Provisions (2017), HEAP provides an additional opt-in option for parties seeking a swift and cost-efficient resolution.
Unlike the Expedited Procedure Provisions, HEAP does not apply automatically and is not linked to any monetary threshold. Instead, it is available on an opt-in basis, irrespective of the amount in dispute.
The suitability of HEAP depends not on the value of the dispute, but rather on its complexity and on the parties' interest in obtaining a rapid resolution. The procedure is intended primarily for disputes involving straightforward factual issues or limited procedural complexity and is therefore not available for joinder or consolidation scenarios.
Proceedings are conducted by a sole arbitrator and are accelerated from the outset. Parties are required to frontload their case by submitting the Statement of Claim together with the Request for Arbitration and the Statement of Defence together with the Answer. The sole arbitrator enjoys broad discretion to limit further submissions, witness evidence and document production and may decide the dispute without a hearing.
Most notably, the award is expected within three months from the initial Case Management Conference, including the ICC Court's scrutiny process.
Another innovative feature is the possibility for parties to agree to an award without reasons. While this may further enhance efficiency, parties should carefully consider potential enforcement risks in jurisdictions that require reasoned awards.
HEAP represents one of the few genuinely new mechanisms introduced by the 2026 Rules. HEAP reinforces one of the central themes of the revision: enabling parties to tailor the arbitral process to the needs of their dispute.
In addition to the headline changes, the 2026 Rules contain several smaller amendments that further modernise the ICC framework and align it with contemporary arbitral practice.
Electronic communications are now the default under Article 3. Requests for Arbitration, Answers and Requests for Joinder are to be submitted electronically, reflecting long-standing practice and the increasing use of ICC Case Connect.
Consistently with the abolition of mandatory Terms of Reference, Article 34 now links award deadlines to the procedural timetable rather than the signing of Terms of Reference, without affecting the specific timelines under the EPP and HEAP.
The Rules also address confidentiality more expressly. For the first time, arbitrators are subject to an explicit confidentiality obligation under Article 12(8), while parties retain the freedom to tailor confidentiality arrangements to the needs of their particular dispute.
Another amendment reflecting contemporary practice concerns virtual tribunal deliberations. Article 19(3) expressly provides that arbitral tribunals may deliberate in person, virtually or in any other appropriate manner. Following the widespread adoption of remote working practices after the COVID-19 pandemic, the amendment formalises what has already become common practice in international arbitration.
Finally, Article 14 expands the factors that may be considered when appointing arbitrators. In addition to traditional criteria such as nationality, residence and availability, the ICC Court may now expressly consider the qualifications and expertise required by the dispute, including expertise in investment protection law where appropriate. Article 14 also provides greater flexibility by allowing direct appointments in suitable cases.
The 2026 ICC Arbitration Rules illustrate the ICC's long-standing approach of measured and pragmatic reform in response to developments in international commerce and arbitral practice.
At the same time, the Rules demonstrate the ICC's willingness to innovate where appropriate. The introduction of Highly Expedited Arbitration, the express recognition of Early Determination and the move away from mandatory Terms of Reference show that the institution continues to adapt its framework to evolving user expectations and the increasing demand for efficiency and proportionality.
In that sense, the 2026 revision reflects one of the ICC's greatest strengths: maintaining continuity while ensuring that the Rules evolve alongside international arbitration itself - with a record caseload and more than 30,000 cases administered to date as testament to their enduring relevance.
