Cal. Mil. & Vet. Code § 999.55

An awarding department shall maintain all records of the information provided by the prime contractor pursuant to Section 999.5 and shall establish appropriate review procedures for those records to ensure the accuracy and completeness of the award amounts and paid amounts reported. The records shall be maintained in a manner that facilitates access and review by external auditors. Records collected pursuant to this section shall be retained for a minimum of six years after collection.