CIV §2984.2: (a) No conditional sale contract, and no agreement between a seller and a buyer made in connection with a conditional sale contract, may provide for the inclusion of title to or a lien upon any proper

(a) No conditional sale contract, and no agreement between a seller and a buyer made in connection with a conditional sale contract, may provide for the inclusion of title to or a lien upon any property other than the following: (1) The motor vehicle which is the subject matter of the sale, including any replacement of that motor vehicle, or accessories, accessions, or replacement of those accessories or accessions, or proceeds thereof. (2) The proceeds of any insurance policies covering the motor vehicle which are required by the seller or the returned premiums of any such policies if the premiums for such policies are included in the amount financed. (3) The proceeds of any credit insurance policies which the buyer purchases in connection with the motor vehicle conditional sale contract or the returned premiums of any such policies if the premiums for such policies are included in the amount financed. (4) The proceeds and returned price of any service contract if the cost of such contract is included in the amount financed. (b) Subdivision (a) shall not apply to any agreement which meets the requirements of subdivision (b) of Section 2982.5 and otherwise complies with this chapter, nor, with respect to a mobilehome sold prior to July 1, 1981, to any agreement whereby a security interest is taken in real property on which the mobilehome is installed on a foundation system pursuant to Section 18551 of the Health and Safety Code. (c) A provision in violation of this section shall be void.