(1) At the preliminary hearing the Tribunal shall determine whether any complaint shall be dealt with as a representative complaint.

(2) At the preliminary hearing the Tribunal shall consider any application that it exercise its powers under section 109 to join further parties to the inquiry.

(3) Any person joined as a party to an inquiry shall file within such time as may be directed by the Tribunal a Notice of Address for Service and the registrar shall deal with that Notice in accordance with regulation 5(3).