Cal. Bus. & Prof. Code § 9889.16

Whenever a licensed adjuster in a licensed station upon an inspection or after an adjustment, made in conformity with the instructions of the bureau, determines that the lamps or the brakes upon any vehicle conform with the requirements of the Vehicle Code, the adjuster shall, when requested by the owner or driver of the vehicle, issue a certificate of adjustment on a form prescribed by the director, which certificate shall contain the date of issuance, the make and registration number of the vehicle, the name of the owner of the vehicle, and the official license of the station.