1. Under Order 32 Rule 242(1) of the High Court Rules 1971, a chamber application must be served on all interested parties separately, and service on one respondent does not constitute automatic service on another respondent merely because they are members of the same organization. 2. A certificate of urgency must comply with the Kuvarega standard by explaining when events occurred, when the applicant became aware of them, and any delay in taking action. The certificate must demonstrate that the matter cannot wait, not merely that a deadline is approaching. 3. The mere filing of a review application does not create urgency for ancillary relief such as a stay of execution.