California Code, Business and Professions Code - BPC § 4999.100

(a) An associate registration shall expire one year from the last day of the month in which it was issued.

(b) To renew a registration, the registrant, on or before the expiration date of the registration, shall do the following:

(c) An expired registration may be renewed by completing all of the actions described in paragraphs (1) to (5), inclusive, of subdivision (b).

(d) The associate registration may be renewed a maximum of five times. Registration shall not be renewed or reinstated beyond six years from the last day of the month during which it was issued, regardless of whether it has been revoked. When no further renewals are possible, an applicant may apply for and obtain a subsequent associate registration number if the applicant meets the educational requirements for registration in effect at the time of the application for a subsequent associate registration number and has passed the California law and ethics examination described in Section 4999.53. An applicant who is issued a subsequent associate registration number pursuant to this subdivision shall not be employed or volunteer in a private practice.