Cal. Vehicle Code § 23576

(a) Notwithstanding Sections 13352, 13352.1, 13353.6, 13353.75, 23573, 23575, 23575.3, and 23700, if a person is required to operate a motor vehicle in the course and scope of their employment and if the vehicle is owned by the employer, the person may operate that vehicle without installation of a functioning, certified approved ignition interlock device if the employer has been notified by the person that the person’s driving privilege has been restricted pursuant to Section 13352, 13352.1, 13353.6, 13353.75, 23573, 23575, 23575.3, or 23700 and if the person has proof of that notification in their possession, or if the notice, or a facsimile copy thereof, is with the vehicle. (b) A motor vehicle owned by a business entity that is all or partly owned or controlled by a person otherwise subject to Section 13352, 13352.1, 13353.6, 13353.75, 23573, 23575, 23575.3, or 23700, is not a motor vehicle owned by the employer subject to the exemption in subdivision (a). (c) This section shall become operative on January 1, 2019. (d) This section shall remain in effect only until January 1, 2033, and as of that date is repealed, unless a later enacted statute, that is enacted before January 1, 2033, deletes or extends that date.