Cal. Civil Code - CIV § 2217. Section 2217.
(a)
This chapter does not preempt, limit, prohibit, or otherwise affect the adoption, implementation, or enforcement of any local ordinance, code, regulation, or order related to carrier of passenger transportation services, except only to the extent that the local ordinance, code, regulation, or order is inconsistent with this chapter. Any local ordinance, code, regulation, or order is not inconsistent with this chapter if it affords greater protection to passengers than the requirements set forth in this chapter. Any local ordinance, code, regulation, or order that duplicates or supplements this chapter shall be construed as providing
additional remedies to those set forth in this chapter, and shall not be construed to preempt, limit, prohibit, or otherwise affect this chapter.
(b)
This chapter shall only be implemented to the extent that implementation is consistent with federal law.