Cal. Penal Code § 19400

A person who is a peace officer or a custodial officer, as defined in Chapter 4.5 (commencing with Section 830) of Title 3 of Part 2, may, if authorized by and under the terms and conditions as are specified by the person’s employing agency, purchase, possess, or transport any less lethal weapon or ammunition for any less lethal weapon, for official use in the discharge of the person’s duties.