This article provides an overview of key provisions of the newly adopted UNCITRAL Expedited Arbitration Rules 2021 and how they interact with the newly revised UNCITRAL Arbitration Rules 2021, of which they form part, emphasising their significance to ad hoc arbitrations. In so doing, it compares and contrasts, by way of background and practice commentary, the Expedited Procedure under the HKIAC Administered Arbitration Rules 2018.