21. Non-joinder of parties

At any stage of the proceedings in any cause or matter, the Court may upon such terms as it thinks just and either on its own motion or on application —

order any person who has been improperly or unnecessarily made a party or who has for any reason ceased to be a proper or necessary party, to cease to be a party;

order any of the following persons to be added as a party namely —

any person who ought to have been joined as a party or whose presence before the Court is necessary to ensure that all matters in dispute in the cause or matter may be effectually and completely determined and adjudicated upon; or