44.1(3)Notwithstanding any other provision in this Act or any provision in the regulations under this Act or in a collective agreement, where, before the commencement of this subsection, a notice to bargain collectively has been given under section 44 and the parties have agreed that the bargaining agent may bargain collectively on behalf of more than one bargaining unit with a view to the conclusion, renewal or revision of a single collective agreement applicable to all of those bargaining units, the bargaining agent may, within twenty days after the commencement of this subsection, apply in writing to the Board, with notice in writing to the employer, for an order that the bargaining units be deemed to be one bargaining unit for the purposes of sections 75, 76, 77 and 77.1.