California Code, Public Utilities Code - PUC § 764

(a) An electrical corporation that has a contract for private fire safety and prevention, mitigation, or maintenance services, shall only use those services for the direct defense of utility infrastructure when conducting fire safety and prevention, mitigation, and maintenance activities as determined to be appropriate by the electrical corporation.

(b) An electrical corporation that has a contract for private fire safety and prevention, mitigation, or maintenance services shall make an effort to reduce or eliminate the use of contract private fire safety and prevention, mitigation, and maintenance personnel in favor of employing highly skilled and apprenticed personnel to perform those services in direct defense of utility infrastructure in collaboration with public agency fire departments having jurisdiction.

(c) Nothing in this section prohibits an electrical corporation from contracting with a public agency fire department or relevant jurisdiction for the purposes of providing fire safety and prevention, mitigation, or maintenance services.