On 1 June 2026, the International Chamber of Commerce’s (ICC) revised Arbitration Rules came into force. Prior to this, the Arbitration Rules were last updated five years ago. The latest changes follow a period of consultation, which gave practitioners and the wider arbitration community the opportunity to provide feedback before the ICC finalised the 2026 Rules.

The changes affect a number of areas of the arbitral process, with a focus on efficiency, transparency, and adapting to new technologies.

The ICC published several useful resources alongside the 2026 Rules, including a comparison of the 2026 and 2021 rules and an explanation of what the ICC views as the most significant changes.

Click here to read the full GT Alert.

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Photo of Clea Bigelow-Nuttall FCIArb Clea Bigelow-Nuttall FCIArb

Clea Bigelow-Nuttall FCIArb is a shareholder at Greenberg Traurig, where she focuses on international commercial and investment arbitration. With deep experience across the infrastructure, construction, and mining and energy sectors, Clea has successfully represented private companies, state-owned entities and sovereign states in high-stakes…

Clea Bigelow-Nuttall FCIArb is a shareholder at Greenberg Traurig, where she focuses on international commercial and investment arbitration. With deep experience across the infrastructure, construction, and mining and energy sectors, Clea has successfully represented private companies, state-owned entities and sovereign states in high-stakes arbitrations under leading institutional rules, including ICC, LCIA, DIAC, HKIAC, SIAC, ICSID, and ad hoc arbitrations under UNCITRAL Rules.

In addition, Clea is a Fellow of the Chartered Institute of Arbitrators, sits as a board member of the global organization ArbitralWomen and co-chairs the global Mute-Off Thursday knowledge-sharing platform for senior women in arbitration. She has previously acted as secretary to arbitral tribunals in contractual disputes in the energy and heavy infrastructure sectors, and is fluent in French and English.

Photo of Sophia Kotsianou Sophia Kotsianou

Sophia Kotsianou is a member of the Litigation and Arbitration Practice in Greenberg Traurig’s London office. Sophia focuses her practice primarily on international commercial arbitration and litigation, concentrating on complex multi-jurisdictional cases.

Photo of Maisie Stewart Maisie Stewart

Maisie is a dispute resolution lawyer and has worked on complex contentious cases of significant value across a number of sectors, including financial services, insurance and aviation.

Maisie has acted on a number of high profile domestic and international disputes in the Commercial…

Maisie is a dispute resolution lawyer and has worked on complex contentious cases of significant value across a number of sectors, including financial services, insurance and aviation.

Maisie has acted on a number of high profile domestic and international disputes in the Commercial Court and Financial List. She has also worked on regulatory investigations, defending clients in investigations concerning financial crime controls and market manipulation, and has experience of contentious restructuring and insolvency matters.