Representatives designated or selected for the purposes of collective bargaining by the majority of the employees in a unit appropriate for such purposes shall be the exclusive representatives of all the employees in such unit for the purposes of collective bargaining in respect to rates of pay, wages, hours of employment, or other conditions of employment. However, any individual employee or group of employees shall have the right at any time to present grievances to their employer and to have such grievances adjusted, without the intervention of the bargaining representative, as long as the adjustment is not inconsistent with the terms of a collective bargaining contract or agreement then in effect, provided that the bargaining representative has been given an opportunity to be present at such adjustment. (Added 1967, No. 198, § 10.)