California Code, Public Utilities Code - PUC § 13575.7

(a) Within 30 days after service of a copy of a decision and order issued by the board pursuant to Section 13575.5, any aggrieved party may file with the superior court a petition for writ of mandate for review thereof. Failure to file a petition shall not preclude a party from challenging the reasonableness and validity of a decision or order of a hearing officer or the board in any judicial proceedings brought to enforce that decision or order or for other civil remedies.

(b) The evidence before the court shall consist of the record before the board, including the hearing officer's record, and any other relevant evidence which, in the judgment of the court, should be considered to effectuate and implement the policies of this division. In every such case, the court shall exercise its independent judgment on the evidence.

(c) Except as otherwise provided in this section, subdivisions (e) and (f) of Section 1094.5 of the Code of Civil Procedure shall govern proceedings pursuant to this section.