Cal. RTC § 6291

Notwithstanding Section 6451, the use taxes imposed by this part with respect to the storage, use or other consumption in this state of a mobilehome or commercial coach required to be registered annually under the Health and Safety Code, or of a vehicle required to be registered under the Vehicle Code, or of a vehicle subject to identification under Division 16.5 (commencing with Section 38000) of the Vehicle Code, or a vehicle that qualifies under the permanent trailer identification plate program pursuant to subdivision (a) of Section 5014.1 of the Vehicle Code, or of a vessel or an aircraft as defined in this chapter are due and payable by the purchaser at the time the storage, use, or other consumption of the property first becomes taxable. Delinquency penalties and interest with respect to use tax for mobilehomes or commercial coaches registered annually with the Department of Housing and Community Development or for vehicles registered with the Department of Motor Vehicles shall be as provided in Section 6292. Delinquency penalties and interest with respect to use tax for vehicles subject to identification under Division 16.5 (commencing with Section 38000) of the Vehicle Code or a vehicle that qualifies under the permanent trailer identification plate program pursuant to subdivision (a) of Section 5014.1 of the Vehicle Code shall be as provided in Section 6293. Delinquency penalties and interest with respect to use tax for vessels and aircraft shall be imposed as if the due date of the tax were fixed by Section 6451.