Cal. Pub. Util. Code § 29046

Within forty (40) days after the mailing of the decision to the petitioner, the petitioner may apply for a writ of mandate in the manner provided in the Code of Civil Procedure. The complete record of the proceedings, or such parts thereof as are designated by the petitioner, shall be prepared by the district and shall be delivered to the petitioner within thirty (30) days after a request therefor, upon payment of the expense of preparation and certification thereof.