Cal. Code Regs. tit. 10, § 2122
Every licensed dealer or dealer's subsidiary who, in connection with a motor vehicle transaction, effects the cancellation of an existing insurance policy pursuant to written authority from the purchaser and takes from the purchaser an assignment of the return premium thereon, or who, in connection with such transaction, takes from the purchaser an assignment of any return premium which may develop upon a future cancellation shall, in either event, upon such cancellation apply the full amount of the gross return premium toward the purchase of replacing insurance required by the contract of sale; except that if the amount thereof be in excess of the amount required for replacing insurance, if there be no replacing insurance or if the premium for such replacing insurance is not included in any contract of sale, such excess or such gross return premium, as the case may be, shall be refunded to the purchaser in one of the following ways:
1. New section filed 9-5-61; designated effective 1-1-62 (Register 61, No. 18).