39. Where notice to bargain collectively has been given, any term or condition of employment applicable to t
he employees in the bargaining unit in respect of which the notice was given that may be embodied in a collective agreement and that was in force on the day the notice was given shall remain in force and shall be obser
ved by the employer affected, the bargaining agent for the bargaining
unit and the employees in the bargaining
unit, except as otherwise provided by an
...[+++]y agreement in that behalf that may be entered into by the employer and the bargaining agent, until such time as