(7) If after such steps, as aforesaid, have been taken, there is still refusal to commence collective bargaining, a trade dispute shall be deemed to exist upon the matters set out in the invitation.
(8) Where a trade union of workmen considers that an employer or a trade union of employers has refused to allow without just cause or excuse any question referred to under the proviso to subsection (3) to be raised in the course of any discussion, the trade union of workmen may, within one month of such refusal, make representations in writing to the Minister who may, before giving any direction thereon, give an opportunity to the employer or his trade union and the trade union of workmen to be heard; and the direction of the Minister shall be final and conclusive.