Cal. Bus. & Prof. Code § 4901
Except as otherwise provided in this chapter, an expired license or registration may be renewed at any time within five years after its expiration on 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 or registration is renewed more than 30 days after its expiration, the licensee or registrant, as a condition precedent to renewal, shall also pay the delinquency fee prescribed by this chapter. 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, if any, is paid, whichever last occurs. If so renewed, the license or registration shall continue in effect through the expiration date provided in Section 4900 that next occurs after the effective date of the renewal, when it shall expire if it is not again renewed.
Ca. Bus. and Prof'l. Code § 4901