California Code, Business and Professions Code - BPC § 9798

(a) Sections 9793, 9794, 9795, and 9796 of this chapter shall not apply to services provided to a general aviation aircraft in distress which is in need of immediate work critical to its preservation and safety, for which consent cannot be expeditiously obtained. In all such instances, the work performed shall be done on a time and material basis, notwithstanding the absence of consent by the customer.

(b) In all instances in which the provisions of subdivision (a) are applicable, Sections 9798.1, 9798.2, 9798.3, and 9798.4 shall also be applicable.