California Code, Public Utilities Code - PUC § 99245

Each transportation planning agency, transit development board created pursuant to Division 11 (commencing with Section 120000), and county transportation commission shall be responsible to ensure that all claimants to whom it directs the allocation of funds pursuant to this chapter shall submit to it an annual certified fiscal audit conducted by an entity other than the claimant.

A report on the audit shall be submitted to the transportation planning agency, transit development board, county transportation commission, and to the Controller within 180 days after the end of the fiscal year. However, the responsible entity may grant an extension of up to 90 days as it deems necessary. The report shall include a certification that the funds allocated to the claimant pursuant to this chapter were expended in conformance with applicable laws and rules and regulations. Except for the first report, the report shall also include the audited amounts for the fiscal year prior to the fiscal year audited.