Cal. VEH § 38135

The department may, upon renewing of an identification of off-highway motor vehicles subject to identification, issue a new identification certificate or may endorse or authorize the endorsement of a receipt or validation upon payment of the required fees. The receipt or validation to be stamped upon the identification certificate last issued for the vehicle during the preceding period, or upon a potential identification certificate issued near the close of the preceding period, which identification certificate so endorsed or validated shall constitute the identification certificate for the ensuing two-year period. If the identification certificate and potential identification certificate are unavailable, a fee as specified in Section 38260 shall not be paid.