Cal. Bus. & Prof. Code § 19260.1

If the bureau has prescribed the forms of accounts, records, and memoranda to be kept by a household mover for any of its business, it is unlawful for any household mover to keep any accounts, records, or memoranda for that business other than those so prescribed or those prescribed by or under the authority of any other state or of the United States, excepting those accounts, records, or memoranda that are explanatory of and supplemental to the accounts, records, or memoranda prescribed by the bureau.