Cal. Health and Safety Code § 18029

(a) It is unlawful for any person to alter or convert, or cause to be altered or converted, the structural, fire safety, plumbing, heat-producing, or electrical systems and installations or equipment of a manufactured home, mobilehome, multifamily manufactured home, special purpose commercial modular, or commercial modular that bears a department insignia of approval or federal label when the manufactured home, mobilehome, multifamily manufactured home, special purpose commercial modular, or commercial modular is used, occupied, sold, or offered for sale within this state, unless its performance as altered or converted is in compliance with this chapter and applicable regulations adopted by the department. The department may adopt regulations providing requirements for alterations and conversions described in this section. (b) (1) Any person required by this chapter or the regulations adopted pursuant to this chapter to file an application for an alteration or conversion who fails to file that application shall pay double the application fee prescribed for the alteration or conversion by this chapter or by regulations adopted pursuant to this chapter. (2) Any person found for a second or subsequent time within a five-year period to have failed to file an application for alteration or conversion or causing the failure to file an application for alteration or conversion for a manufactured home, mobilehome, multifamily manufactured home, special purpose commercial modular, or commercial modular shall pay 10 times the application fee prescribed in this chapter or by the regulations adopted pursuant to this chapter.