(a) The provisions of this chapter, except Section 18037.5, shall not apply to any loan or credit sale secured by a manufactured home or mobilehome subject to registration under this part unless the loan or credit sale was made under circumstances which required disclosures under Regulation Z, as defined by Section 18036.5.
(b) In no respect shall the sale or financing of a manufactured home or mobilehome subject to this chapter and of any goods or services sold in conjunction with the sale of the manufactured home or mobilehome be subject to the Retail Installment Sales Act, Chapter 1 (commencing with Section 1801) of Title 2 of Part 4 of Division 3 of the Civil Code or the Automobile Sales Finance Act, Chapter 2b (commencing with Section 2981) of Title 14 of Part 4 of Division 3 of the Civil Code.