California Code, Financial Code - FIN § 1717

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

(2) If a proceeding to revoke or suspend a license is pending 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 is effective at the time and upon the conditions that the commissioner may by order specify.