California Code, Health and Safety Code - HSC § 116140

Whenever a person possessing a place that is infested with rodents, fails, neglects, or refuses to proceed and to continue to endeavor to exterminate and destroy the rodents and abate the conditions listed in Section 17920.3 that are causing the infestation, as required in this article and Chapter 3 (commencing with Section 116250), the department and its inspectors, the county board of supervisors and its inspectors, and the local health officer, shall at once cause the rodents to be exterminated and destroyed and the conditions listed in Section 17920.3 that are causing the infestation to be abated.