California Code, Business and Professions Code - BPC § 9884.16

(a) A person required to have a valid registration under the provisions of this chapter shall not have the benefit of any lien for labor or materials, including the ability to charge storage fees in accordance with applicable laws, or the right to sue on a contract for motor vehicle repairs unless the person possesses a valid registration.

(b) The bureau may adopt regulations, as necessary, in accordance with Chapter 6.5 (commencing with Section 3067) of Title 14 of Part 4 of Division 3 of the Civil Code and Section 22524.5 of the Vehicle Code, and any regulations of the Insurance Commissioner pertaining to vehicle towing or storage fees, or both, adopted pursuant to Sections 758.5 and 790.03 of the Insurance Code, to carry out the provisions of this section.