Sixteen Changes, One Direction: What the ICC 2026 Rules Reveal About the Future of Institutional Arbitration

On 1 June 2026, the International Chamber of Commerce’s (“ICC”) revised Arbitration Rules (the “2026 Rules”) entered into force (see previous coverage here and here). ICC International Court of Arbitration (“ICC Court”) President Claudia Salomon has described them as designed to enhance efficiency, clarity and usability — language that, in institutional communications, often signals incremental refinement rather than structural change.

That reading would be wrong. The 2026 Rules introduce sixteen substantive changes. In December 2025, the ICC registered its 30,000th case since its creation in 1923; in 2025, 881 new cases were filed with pending disputes totalling USD 299 billion. Read together, the sixteen changes reveal a coherent institutional direction: the ICC is systematically closing the gaps between its procedural framework and the realities of how complex international arbitration is actually practised. Each gap it closes tells us something about where the institution believes the practice is going.

The Disclosure Architecture: From Guidance to Rules

The 2026 Rules elevate two critical principles from the Note to Parties and Arbitral Tribunals on the Conduct of the Arbitration (the “Note”) into the Rules themselves. First, doubts about whether to disclose shall be resolved in favour of disclosure. Second, disclosure does not, by itself, establish a lack of independence or impartiality. Their elevation to Article 12 gives them a different legal character: they are now enforceable standards, not aspirational guidance. An arbitrator who disregards them is no longer departing from best practice — she is violating the Rules.

More consequential is Article 12(5), which requires parties to submit lists of persons and entities whom prospective arbitrators should consider for disclosure purposes. This shifts the disclosure identification exercise from the arbitrator — who may not know the full landscape of a party’s relationships — to the party itself. The harder question practice will resolve is what follows from an incomplete or strategically curated list: whether omissions can found a challenge, and whether the ICC Court will scrutinise list adequacy as part of its oversight.

Read together with the new express confidentiality obligation under Article 12(8) — which for the first time requires arbitrators to keep confidential all matters relating to the arbitration unless otherwise in the public domain, agreed by the parties, required by applicable law, or necessary to protect a legal right or comply with disclosure obligations — the 2026 Rules create a more coherent framework for arbitrator conduct throughout a dispute. The ICC rejected default confidentiality for ICC arbitrations, leaving proceedings confidentiality to party agreement. The institution will regulate its own agents but not the terms on which parties choose to proceed.

Emergency Arbitration: The Scope Expansion That Changes the Calculus

The most practically significant change may be the expansion of Emergency Arbitration (“EA”) scope under Article 1(2) of Appendix IV. EA proceedings may now be initiated against any party for which the President of the ICC Court is satisfied, based on information in the application, that an arbitration agreement binding such party may exist — not only confirmed signatories or their successors. The change is deceptively modest in drafting; its practical consequences are significant.

This change reflects 287 EA applications administered since 2012. Many involved complex corporate structures where a binding arbitration agreement was genuinely contestable and where the signatory-only rule prevented access to urgent relief regardless of the underlying merits. The 2026 revision empowers the President to make a prima facie jurisdictional assessment while preserving the arbitral tribunal’s authority in the main proceedings. Article 7(1) of Appendix IV introduces preliminary orders — including ex parte orders where prior notification would frustrate the application — making ICC EA a meaningfully more powerful mechanism than under the 2021 Rules. Appropriate restraint in its exercise is the question early practice will answer.

The Terms of Reference: An End and a Beginning

The removal of the mandatory Terms of Reference (“ToR”) has attracted the most commentary — the ToR having been a continuous feature of ICC practice since 1922, formalised under that name in the 1955 revision of the Rules. But the commentary has focused almost entirely on what is lost. The more consequential question is what replaces it, and what that replacement demands of practitioners.

What replaces the ToR is the first Case Management Conference (“CMC”), expressly required within 30 days of the tribunal receiving the file, with no new claims permitted after that point without tribunal authorisation. The ICC’s own data is instructive: of 1,034 cases administered under the Expedited Procedure Provisions since 2017 — under which ToR were already optional — fewer than 25 tribunals drew them up. The mandatory ToR had already lost much of its practical significance, at least where efficiency was the governing priority. The 2026 Rules extend that conclusion to standard proceedings.

This change has particular resonance for practitioners from legal cultures — including India — where claim framing has historically been an iterative exercise and the assumption that a dispute can be progressively refined has governed pre-trial strategy. Under the 2026 Rules, the CMC becomes the operative cut-off for new claims, making the Request for Arbitration the primary claim-framing document. Practitioners who treat it as a placeholder will find themselves foreclosed at the first procedural milestone. The discipline this imposes is closer to what has long been expected at the pleadings stage in other institutional proceedings: the Statement of Case under Article 15.2 of the LCIA Rules 2020 and the Statement of Claim under Rule 33.2 of the SIAC Rules 2025 are each expected to set out all relevant facts, legal submissions, and relief with sufficient particularity. What the 2026 ICC Rules add is the institutional deadline that makes that discipline non-negotiable from the outset.

The Highly Expedited Procedure: Speed as Institutional Convergence

The Highly Expedited Arbitration Procedure (“HEAP”) under Article 33 and Appendix VI — a final award within three months of the initial CMC — reflects a broader institutional convergence. Comparable ultra-expedited tracks include the SIAC Expedited Procedure under Rule 14 and Schedule 3 of the SIAC Rules 2025, the HKIAC fast-track provisions, and the SCC Rules for Expedited Arbitrations 2023 — which similarly mandate a final award within three months. Unlike the ICC’s existing Expedited Procedure Provisions, HEAP carries no monetary threshold and applies on an opt-in basis regardless of the amount in dispute.

Its distinctive structural feature is strict front-loading: both the Request for Arbitration and the Answer must include complete pleadings supported by evidence and legal authorities. This architecture suits disputes with a fixed factual matrix and discrete legal issues — a pure contractual interpretation question, a quantum dispute where liability is admitted, a payment claim under a negotiable instrument. It is unsuitable in matters where the record will develop through disclosure or witness evidence. The risk of a legally vulnerable award produced under procedural pressure is real. HEAP’s value depends entirely on disciplined case selection, and that discipline must come from counsel.

The Tribunal Secretary: From Practice to Rule

Article 44’s codification of tribunal secretary appointments resolves a long-standing ambiguity that had produced, in some proceedings, genuine disputes about role, remuneration, and accountability. Independence and impartiality requirements are now express. The prohibition on undisclosed financial arrangements between arbitrators and their secretaries is directly addressed. Secretaries must sign the same acceptance statement as arbitrators, bringing them within the formal accountability structure of the Rules for the first time. As reliance on tribunal secretaries has grown alongside the complexity of ICC proceedings, placing it on an explicit regulatory footing is both overdue and correct.

What the Sixteen Changes Reveal

Taken individually, each of the 2026 changes has a specific procedural justification. Taken together, they map onto three pressures that have defined international arbitration over the past decade. The growing complexity of disputes and corporate structures is addressed by expanding EA scope to potential non-signatories and front-loading case definition through the CMC. The growing scrutiny of arbitrator conduct is addressed by the disclosure architecture — Article 12(5) and Article 12(8) — and by tribunal secretary accountability under Article 44. Competitive pressure from faster-moving institutions is addressed by HEAP, the removal of the mandatory ToR, and early determination under Article 30. The sixteen changes are not sixteen separate decisions. They are a single strategic repositioning expressed through procedural detail.

The ICC’s response has been characteristically careful. It has not abandoned what makes it institutionally distinctive — the Court’s supervisory role remains robust. The 2025 Queen Mary University of London and White & Case International Arbitration Survey — the fourteenth in the series — confirmed London as the most preferred seat globally at 34%, Singapore and Hong Kong at 31% each, and ICC Rules as the most preferred arbitration rules worldwide. Its 2026 revision is not the work of an institution under existential pressure — it is the work of one that understands that complacency is its own form of risk.

Open questions remain, and they are not trivial. How the ICC Court treats incomplete disclosure lists under Article 12(5) will determine whether that provision fulfils its structural purpose or becomes a formality. The scope of the President’s prima facie assessment under Article 1(2) of Appendix IV will determine whether expanded EA is a genuine access mechanism or an invitation to speculative applications. How HEAP’s front-loading requirements interact with due process standards will shape whether three-month arbitration delivers durable outcomes rather than merely fast ones.