Article 14 Protection of persons interested not parties to an appeal

If at the hearing of an appeal it appears to the tribunal that the appellant has established a prima facie case for varying the determination of the Commission and that the variation may affect prejudicially a person interested who is not a party to the appeal, the tribunal may, before deciding the appeal, afford an opportunity to that person to be joined as a party to the appeal and to be heard by the tribunal, and may give such directions as may be requisite for the purpose.