Cal. Welf. & Inst. Code § 4313

The chief of police services, supervising investigators, investigators, and each hospital police officer have the powers and authority conferred by law upon each respectively as set forth in subdivision (v) of Section 830.3 and Section 830.38 of the Penal Code. When and as directed by the hospital director, the chief of police services, supervising investigators, investigators, and hospital police officers shall enforce the rules and regulations of the hospital, preserve peace and order on the premises thereof, protect and preserve the property of the state, and help ensure integration of treatment, safety, and security.