Cal. Penal Code § 26030

(a) Section 25850 does not apply to any of the following who have been issued a certificate pursuant to subdivision (d): (1) Guards or messengers of common carriers, banks, and other financial institutions, while actually employed in and about the shipment, transportation, or delivery of any money, treasure, bullion, bonds, or other thing of value within this state. (2) Guards of contract carriers operating armored vehicles pursuant to California Highway Patrol and Public Utilities Commission authority, if they were hired prior to January 1, 1977. (3) Guards of contract carriers operating armored vehicles pursuant to California Highway Patrol and Public Utilities Commission authority, if they were hired on or after January 1, 1977, and they have completed a course in the carrying and use of firearms that meets the standards prescribed by the Department of Consumer Affairs. (4) Private investigators licensed pursuant to Chapter 11.3 (commencing with Section 7512) of Division 3 of the Business and Professions Code, while acting within the course and scope of their employment. (5) Uniformed employees of private investigators licensed pursuant to Chapter 11.3 (commencing with Section 7512) of Division 3 of the Business and Professions Code, while acting within the course and scope of their employment. (6) Private patrol operators licensed pursuant to Chapter 11.5 (commencing with Section 7580) of Division 3 of the Business and Professions Code, while acting within the course and scope of their employment. (7) Uniformed employees of private patrol operators licensed pursuant to Chapter 11.5 (commencing with Section 7580) of Division 3 of the Business and Professions Code, while acting within the course and scope of their employment. (8) Alarm company operators licensed pursuant to Chapter 11.6 (commencing with Section 7590) of Division 3 of the Business and Professions Code, while acting within the course and scope of their employment. (9) Uniformed security guards or night watch persons employed by any public agency, while acting within the scope and course of their employment. (10) Uniformed security guards, regularly employed and compensated in that capacity by persons engaged in any lawful business, and uniformed alarm agents employed by an alarm company operator, while actually engaged in protecting and preserving the property of their employers, or on duty or en route to or from their residences or their places of employment, and security guards and alarm agents en route to or from their residences or employer-required range training. (b) Nothing in paragraph (10) of subdivision (a) shall be construed to prohibit cities and counties from enacting ordinances requiring alarm agents to register their names. (c) A certificate under this section shall not be required of any person who is a peace officer, who has completed all training required by law for the exercise of the person’s power as a peace officer, and who is employed while not on duty as a peace officer. (d) The Department of Consumer Affairs may issue a certificate to any person referred to in this section, upon notification by the school where the course was completed, that the person has successfully completed a course in the carrying and use of firearms and a course of training in the exercise of the powers of arrest, which meet the standards prescribed by the department pursuant to Section 7583.5 of the Business and Professions Code.