Cal. Bus. & Prof. Code § 2535.2
Except as provided in Section 2535.3, a license that has expired may be renewed at any time within five years after its expiration upon filing of an application for renewal on a form prescribed by the board and payment of all accrued and unpaid renewal fees. If the license is not renewed on or before its expiration, the licensee, as a condition precedent to renewal, shall also pay the prescribed delinquency fee. Renewal under this section shall be effective on the date on which the application is filed, on the date on which all renewal fees are paid, or on the date on which the delinquency fee is paid, whichever last occurs. If so renewed, the license shall continue in effect through the expiration date provided in Section 2535, after the effective date of the renewal, when it shall expire and become invalid if it is not again renewed.
Ca. Bus. and Prof'l. Code § 2535.2