California Code, Public Utilities Code - PUC § 105141

Except as otherwise provided in Article 2 (commencing with Section 105150), whenever a majority of the employees employed by the district in a unit appropriate for collective bargaining indicate a desire to be represented by a labor organization, and upon determining that the labor organization represents at least a majority of the employees in the appropriate unit, the board and the accredited representative of employees shall bargain in good faith and make all reasonable efforts to reach agreement on the terms of a written contract governing wages, hours, and other terms and conditions of employment within the scope of representation set forth in Section 3504 of the Government Code.