California Code, Vehicle Code - VEH § 12504

(a) Sections 12502 and 12503apply to any nonresident over the age of 16 years but under the age of 18 years. The maximum period during which that nonresident may operate a motor vehicle in this state without obtaining a driver's license is limited to a period of 10 days immediately following the entry of the nonresident into this state except as provided in subdivision (b) of this section.

(b) Any nonresident over the age of 16 years but under the age of 18 years who is a resident of a foreign jurisdiction which requires the licensing of drivers may continue to operate a motor vehicle in this state after 10 days from his or her date of entry into this state if he or she meets both the following:

(c) Whenever any of the conditions for the issuance of a nonresident minor's certificate cease to exist, the department shall cancel the certificate and require the minor to surrender it to the department.