CPR 23 refers to Part 23 of the Civil Procedure Rules in England and Wales, which governs the making and management of applications (interim or otherwise) in civil court proceedings. It sets out how parties apply to the court, when an application notice is required, service and evidence requirements (including witness statements), and the procedure for hearings (on notice, without notice, or dealt with without a hearing). CPR 23 is central to day-to-day civil litigation practice, covering applications for directions, extensions of time, specific disclosure, relief from sanctions and many other case management orders. It works alongside related provisions such as CPR 3 (case management) and Practice Directions, and is not a statutory code but a core component of the court rules made under the Civil Procedure Act 1997. The term “CPR 23” is specific to civil procedure in England and Wales. Scotland, Northern Ireland and Ireland have their own court rules for motions and applications (e.g. Rules of the Court of Session, County Court Rules, Rules of the Superior Courts) and do not use the CPR 23 terminology, though the functional role of interim applications is broadly comparable.