California Code, Vehicle Code - VEH § 11709.4

(1) If the dealer agreed to pay a specified amount on the prior credit or lease balance owing on the vehicle purchased or obtained in trade, and the agreement to pay the specified amount is contained in a written agreement documenting the transaction, the dealer shall tender the agreed upon amount as provided in the written agreement to the lessor registered in accordance with Section 4453.5, or to the legal owner reflected on the ownership certificate, or to the designee of that lessor or legal owner of the vehicle purchased or obtained in trade within 21 calendar days of purchasing or obtaining the vehicle in trade.

(2) If the dealer did not set forth an agreement regarding payment of a prior credit or lease balance owed on the vehicle purchased or obtained in trade, in a written agreement documenting the transaction, the dealer shall tender to the lessor registered in accordance with Section 4453.5, or to the legal owner reflected on the ownership certificate, or to the designee of that lessor or legal owner of the vehicle purchased or obtained in trade, an amount necessary to discharge the prior credit or lease balance owing on the vehicle purchased or obtained in trade within 21 calendar days of purchasing or obtaining the vehicle in trade.

(3) The time period specified in paragraph (1) or (2) may be shortened if the dealer and consumer agree, in writing, to a shorter time period.

(4) A dealer shall not sell, consign for sale, or transfer any ownership interest in the vehicle purchased or obtained in trade until an amount necessary to discharge the prior credit or lease balance owing on the vehicle has been tendered to the lessor registered in accordance with Section 4453.5, or to the legal owner reflected on the ownership certificate, or to the designee of that lessor or legal owner of the vehicle purchased or obtained in trade.