(1) Application for approval of a contract agreement may be made by lodging the agreement with the Industrial Registrar in accordance with this Part and the rules of the Commission.
(2) At proceedings of the Commission relating to any such application for approval, the following may appear or be represented--(a) any party to the agreement,(b) any association registered under this Chapter if its members or persons eligible to become members are affected by the agreement (but only with leave of the Commission),(c) a State peak council (but only with leave of the Commission),(d) the President of the Anti-Discrimination Board (but only with leave of the Commission).