Cal. Insurance Code § 488.5

(a) An insurer shall not, in issuing or renewing a private automobile insurance policy to a peace officer, member of the Department of the California Highway Patrol, or firefighter, with respect to his or her operation of a private passenger motor vehicle, increase the premium on that policy for the reason that the insured or applicant for insurance has been involved in an accident while operating an authorized emergency vehicle, as defined in subdivision (a) or (f) of Section 165 of the Vehicle Code or in paragraph (1) or (2) of subdivision (b) of Section 165 of the Vehicle Code, or any employer-leased vehicle or employer-rented vehicle, in the performance of his or her duty during the hours of his or her employment, or was involved in an accident while operating his or her private passenger motor vehicle in the performance of his or her duty at the request or direction of an employer. (b) An insurer shall not, in issuing or renewing a private automobile insurance policy to a federal officer or federal customs agent, with respect to his or her operation of a private motor vehicle, increase the premium on that policy for the reason that the insured or applicant for insurance has been involved in an accident while operating an official government vehicle in the performance of his or her duty during the hours of his or her employment. (c) As used in this section: (1) “Peace officer” means every person defined in Chapter 4.5 (commencing with Section 830) of Title 3 of Part 2 of the Penal Code. (2) “Policy” shall have the same meaning as defined in subdivision (a) of Section 660.