California Code, Business and Professions Code - BPC § 22957

(a) In addition to the primary enforcement responsibility assumed by the department, another enforcing agency may conduct inspections and assess penalties for violations of this division if the enforcing agency complies with this division and with all applicable laws and guidelines developed pursuant to this division.

(b) State and local enforcement agencies are encouraged, in order to avoid duplication, to share the results of inspections and coordinate with the department when enforcing this division.