California Code, Corporations Code - CORP § 29542

(a) If, in the opinion of the commissioner, any person is engaging or has engaged in any activity in violation of any provision of this law, or rule or order under this law, the commissioner may order the person to desist and refrain from the activity unless and until the activity will not be in violation of any provision of this law or any rule or order under this law.

(b) If after an order has been made under subdivision (a), a request for hearing is filed in writing within 30 days of the date of service of the order by the person to whom the order was directed, a hearing shall be held in accordance with the Administrative Procedure Act (Chapter 5 (commencing with Section 11500) of Part 1 of Division 3 of Title 2 of the Government Code), and the commissioner shall have all of the powers granted under the Administrative Procedure Act.  Unless the hearing is commenced within 15 business days after the request is filed (or the person affected consents to a later date), the order is rescinded.

If that person fails to file a written request for a hearing within 30 days from the date of service of the order, the order shall be deemed a final order of the commissioner and shall not be subject to review by any court or agency, notwithstanding Section 29563.