V C Section 5204 Registration Tabs
5204. (a) Except as provided by subdivisions (b) and (c), a tab shall indicate the year of expiration and a tab shall indicate the month of expiration. Current month and year tabs shall be attached to the rear license plate assigned to the vehicle for the last preceding registration year in which license plates were issued, and, when so attached, the license plate with the tabs shall, for the purposes of this code, be deemed to be the license plate, except that truck tractors, and commercial motor vehicles having a declared gross vehicle weight of 10,001 pounds or more, shall display the current month and year tabs upon the front license plate assigned to the truck tractor or commercial motor vehicle. Vehicles that fail to display current month and year tabs or display expired tabs are in violation of this section.
(b) The requirement of subdivision (a) that the tabs indicate the year and the month of expiration does not apply to fleet vehicles subject to Article 9.5 (commencing with Section 5300) or vehicles defined in Section 468.
(c) Subdivision (a) does not apply when proper application for registration has been made pursuant to Section 4602 and the new indicia of current registration have not been received from the department.
(d) This section is enforceable against any motor vehicle that is driven, moved, or left standing upon a highway, or in an offstreet public parking facility, in the same manner as provided in subdivision (a) of Section 4000.