Cal. Health and Safety Code - HSC § 52095. Section 52095.
Whenever a complaint is received concerning a violation of the restrictions imposed pursuant to Section 52080, the city or county shall investigate promptly and make a report to the complaining party on whether the violation existed and whether it persists, and if it persists, what action the city or county will take to remedy the violation. When the city or county determines that a violation exists, whether determined upon an investigation of a complaint or on its own motion, the city or county shall take all appropriate action, including necessary legal action,
to promptly eliminate the violation.
Notwithstanding any provision of this section, any person aggrieved by a violation may seek a judicial remedy without regard to whether a complaint has been made to the city or county or whether the city or county is then taking any action to remedy the violation.