California Code, Financial Code - FIN § 16800

(b)(1) Except as otherwise provided in paragraph (2), a voluntary surrender of a license shall be effective on the 30th day after the license and the report called for in subdivision (a) are filed with the commissioner or on an earlier date as the commissioner may by order specify.

(2) If a proceeding to revoke or suspend a license is pending at the time when the license and the report called for in subdivision (a) are filed with the commissioner or if a proceeding to revoke or suspend a license or to impose conditions upon the surrender of a license is instituted before the 30th day after the license and the report called for in subdivision (a) are filed with the commissioner, the voluntary surrender of the license shall become effective at the time and upon the conditions that the commissioner may by order specify.