California Code, Business and Professions Code - BPC § 8024.2

(a) Except as otherwise provided in this article, a certificate that has expired may be renewed at any time within the period set forth in Section 8024.5 by doing all of the following:

(b) If the certificate is not renewed within 30 days after its expiration, the certificate holder, as a condition precedent to renewal, shall also pay the delinquency fee set forth in Section 163.5.  Renewal under this section shall be effective on the date on which the renewal fee is paid, or on the date on which the delinquency fee, if any, is paid, whichever last occurs.  If so renewed, the certificate shall continue in effect through the date provided in Section 8024 which next occurs after the effective date of the renewal, when it shall expire if it is not again renewed.

The certificate shall not be renewed if the certificate holder has failed to pay monetary sanctions identified in subdivision (g) of Section 8025.