Cal. Health & Safety Code § 14865

It is the intent of the Legislature to provide for the highest level of safety for firefighters and the communities they protect by regulating the use of privately contracted private fire prevention resources. Nothing in this part shall be construed or otherwise interpreted to authorize public agencies to contract for firefighting services or other first response services. The Legislature finds and declares that firefighting and fire protection services are a municipal function and a public good to be provided by public agencies and their employees.