California Code, Business and Professions Code - BPC § 2553.7

(a) Registrations shall expire at midnight on the last day of the month in which the license was issued during the second year of a two-year term if not renewed.

(b) Except as otherwise provided by Section 114, any registration under this chapter may be renewed at any time within three years after its expiration by filing an application for renewal or reactivation on a form prescribed by the board, paying all accrued and unpaid renewal fees or reactivation fees as determined by the board and by paying any delinquency fees prescribed by the board.  If the registration under this chapter is not renewed three years after its expiration, the registration shall be considered cancelled and may not be reinstated or renewed.