California Code, Public Utilities Code - PUC § 30751

Any question which may arise with respect to whether a majority of the employees in an appropriate unit desire to be represented by a labor organization shall be submitted to the Public Employment Relations Board. In resolving those questions of representation including the determination of the appropriate unit or units, petitions, the conduct of hearings and elections, the board shall apply the relevant federal law and administrative practice developed under the Labor Management Relations Act, 1947, as amended   1, and for this purpose shall adopt appropriate rules and regulations.Those rules and regulations shall be administered by the California State Mediation and Conciliation Service and shall provide for a prompt public hearing and a secret ballot election to determine the question of representation.