Uniform Civil Procedure Rules 2005
Current version for 9 April 2020 to date (accessed 5 August 2020 at 14:27)
Part 6 Division 5 Rule 6.24
6.24   Court may join party if joinder proper or necessary
(cf SCR Part 8, rule 8(1); DCR Part 7, rule 8(1); LCR Part 6, rule 8(1))
(1)  If the court considers that a person ought to have been joined as a party, or is a person whose joinder as a party is necessary to the determination of all matters in dispute in any proceedings, the court may order that the person be joined as a party.
(2)  Without limiting subrule (1), in proceedings for the possession of land, the court may order that a person (not being a party to the proceedings) who is in possession of the whole or any part of the land (whether in person or by a tenant) be added as a defendant.