Civ. Code, § 2982.10

(a) In consideration of the assignment of a conditional sale contract, the seller shall not receive or accept from the assignee any payment or credit based upon any amount collected or received, or to be collected or received, under the contract as a finance charge except to the extent the payment or credit does not exceed the amount that would be calculated in accordance with Regulation Z, whether or not Regulation Z applies to the contract, as the contract’s finance charge using, for the purposes of the calculation, an annual percentage rate equal to 2.5 percent for a contract having an original scheduled term of 60 monthly payments or less or 2 percent for a contract having an original scheduled term of more than 60 monthly payments.

(b) Subdivision (a) does not apply in the following circumstances:

(1) An assignment that is with full recourse or under other terms requiring the seller to bear the entire risk of financial performance of the buyer.

(2) An assignment that is more than six months following the date of the conditional sale contract.

(3) Isolated instances resulting from bona fide errors that would otherwise constitute a violation of subdivision (a) if the seller maintains reasonable procedures to guard against any errors and promptly, upon notice of the error, remits to the assignee any consideration received in excess of that permitted by subdivision (a).

(4) The assignment of a conditional sale contract involving the sale of a motorcycle, as defined in Section 400 of the Vehicle Code.

(5) The assignment of a conditional sale contract involving the sale of an off-highway motor vehicle that is subject to identification under Section 38010 of the Vehicle Code.