Cal. Veh. Code § 40005
Whenever a driver is cited for a violation of any provision of this code, or regulations promulgated pursuant to this code, relating to the size, weight, equipment, registration, fees, or loading of a vehicle, while operating a vehicle he was employed or otherwise directed to operate, and which is not owned by him, and the driver gives the citation to the owner or any other person referred to in Section 40001, if the owner or other person undertakes to answer the charge or otherwise to cause its disposition without any further action by the driver and then fails to act in accordance with the undertaking as a consequence of which a warrant is issued for the arrest of the driver, the owner or other person is guilty of a misdemeanor.
Ca. Veh. Code § 40005