Cal. Pub. Cont. Code § 22178
(b) The city, county, city and county, or special district shall designate an unbiased independent auditor to review the cost of any proposed contract. The independent auditor shall prepare a report on the cost of the contract and provide the report to all parties and make it available to the public before the governing body takes any action to approve or disapprove the contract. The report shall comply with the following: