Joinder and representative respondents

16.—(1) A tribunal may at any time, on the application of any person made by notice to the Secretary or of its own motion, direct any person against whom any relief is sought to be joined as a party, and give such consequential directions as it considers necessary.

(2) A tribunal may likewise, on such application or of its own motion, order that any respondent named in the originating application or subsequently added, who appears to the tribunal not to have been, or to have ceased to be, directly interested in the subject of the originating application, be dismissed from the proceedings.

(3) Where there are a number of persons having the same interest in an originating application, one or more of them may be cited as the person or persons against whom relief is sought, or may be authorised by the tribunal, before or at the hearing, to defend on behalf of all the persons so interested.