California Code, Public Utilities Code - PUC § 120501

Whenever a majority of the employees employed by the board in a unit that is the appropriate unit for collective bargaining indicate a desire to be represented by a labor organization and upon determining as provided in Section 120505, that such labor organization represents the majority of the employees in that appropriate unit, the board shall meet and confer in a good-faith effort to agree on the terms of a written contract with the recognized representatives of such employees governing wages, salaries, hours, working conditions, and benefits, including, but not limited to, health and welfare, sick leave, insurance, or pension or retirement provisions.