(1) Where a trade union is certified under this Chapter as the exclusive bargaining agent for the employees in the bargaining unit—
(a) the trade union shall replace any other trade union that before such certification was the bargaining agent for the employees in the bargaining unit and shall have exclusive authority to bargain collectively on behalf of the employees in the bargaining unit and to bind them by a collective agreement so long as such certification remains in force;
(b) if another trade union had previously been certified or was deemed to have been certified in respect of employees in the bargaining unit, the certification of the last mentioned trade union shall be deemed to be revoked in respect of such employees; and
(c) the certified trade union shall be substituted as a party to any collective agreement applicable to any employees in the bargaining unit in the place of the bargaining agent named in the collective agreement.
(2) Where a trade union has been certified as the recognized bargaining agent for a bargaining unit in accordance with this Division, the employer shall recognize the trade union and the trade union and the employer shall meet and engage in collective bargaining in good faith and make every reasonable effort to conclude a collective agreement.