Supreme Court Rules 2000

A defendant to an action, by counterclaim in that action, may claim relief from a plaintiff together with any other person.

A defendant raising a counterclaim under subrule (1) is to – add to the title of the defence a further title similar to the title in the statement of claim, setting out the names of all the persons who, if the counterclaim were to be enforced by cross-action, would be defendants; and deliver the defence to any defendant to the counterclaim who is a party to the action within the period limited by these rules; and serve the defence, endorsed with a notice directed to that person in accordance with the prescribed form, on any defendant to the counterclaim who is not a party to the action in the same manner as a writ.