California Code, Business and Professions Code - BPC § 14217

(a) A registration of mark pursuant to this chapter shall be effective for a term of five years from the date of registration and, upon application filed within six months prior to the expiration of the term, in a manner complying with the requirements of the secretary, the registration may be renewed for a like term from the end of the expiring term.  A renewal fee, payable to the secretary, shall accompany the application for renewal of the registration as set forth in subdivision (c) of Section 12193 of the Government Code.

(b) A registration may be renewed for successive periods of five years in like manner.

(c) Any registration in force on January 1, 2008, shall continue in full force and effect for the unexpired term thereof, and may be renewed by filing an application for renewal with the secretary that complies with the requirements of the secretary and payment of the renewal fee within the six months prior to the expiration of the registration.

(d) All applications for renewal under this chapter, whether of registrations made under this chapter or of registrations effected under any prior act, shall include a verified statement that the mark has been and is still in use and shall include a specimen showing actual use of the mark on, or in connection with, the goods or services with which the mark is associated.