1. Unless the Court gives leave to the contrary or a statement of claim is indorsed on the writ, the plaintiff must serve a statement of claim on the defendant or, if there are two or more defendants, on each defendant, and must do so either when the writ, or notice of the writ, is served on that defendant or at any time after service of the writ or notice but before the expiration of 6 weeks after that defendant enters an appearance.