The CIMA Rules, 2025 The CIMA Arbitration and Mediation Rules 2025 constitute the procedural framework presently in force under the Center for International Mediators and Arbitrators (CIMA), an institution incorporated in England and Wales with a broad international mandate. These Rules govern the conduct of both domestic and international arbitration and mediation, providing detailed guidance on commencement of proceedings, official communications, and the respective duties of the Registrar and