Article 14 Parties to an appeal
(1)
The Tribunal may at any stage of an appeal order any person (other than the traffic commissioner) to be added as a party to the appeal.
(2)
The parties to an appeal are:
(a)
the appellant;
(b)
every person who is entitled by rule 13(1)(b), (c) or (d) to receive a copy of the notice of appeal and who replies that he wishes to become a party in accordance with rule 13(2);
(c)
every representor who is given permission by the Tribunal to become a party to the appeal; and
(d)
every person who is added as a party by order of the Tribunal pursuant to this rule.