This Practice Note is produced in partnership with Ms Koh Swee Yen, Senior Counsel and Partner, Mr Joel Quek, Partner, Ms Magdalene Ong, Partner, Ms Divya Harchandani, Foreign Lawyer and Ms Thea Elyssa Vega, Foreign Lawyer all of WongPartnership LLP, Singapore. The th Edition of the SIAC Rules came into effect from 1 January 2025 and can be accessed here. The 2025 SIAC Rules apply to arbitrations commenced on or after 1 January 2025, unless the parties have agreed otherwise. Number of arbitrators Unless otherwise agreed by the parties, the tribunal shall comprise one or three arbitrators. In the event that parties have not agreed on the number of arbitrators, a sole arbitrator shall be appointed, unless the Registrar determines, after considering the views of the parties, that the dispute warrants the appointment of three arbitrators (2025 SIAC Rules, r 19.1). The 2025 SIAC Rules require the claimant