Corp. Code, § 25143

(a) The commissioner may by order summarily postpone or suspend the effectiveness of any qualification pending final determination of any proceeding under this chapter. Upon the entry of the order, the commissioner shall promptly notify each person specified in subdivision (b) of this section that it has been entered and of the reasons therefor and that upon the receipt of a written request the matter will be set down for hearing to commence within 15 business days after such receipt unless the applicant consents to a later date. If no hearing is requested and none is ordered by the commissioner, the order will remain in effect until it is modified or vacated by the commissioner. If a hearing is requested or ordered, the commissioner, after notice and hearing in accordance with subdivision (b) of this section, may modify or vacate the order or extend it until final determination.

(b) No stop order may be entered under this chapter except under subdivision (a) of this section without appropriate prior notice to the applicant, the issuer, and the person on whose behalf the securities are to be or have been offered and hearing in accordance with the provisions of the Administrative Procedure Act, Chapter 5 (commencing with Section 11500) of Part 1 of Division 3 of Title 2 of the Government Code, in connection with which the commissioner shall have all of the powers granted thereunder. In the case of qualification by permit, such hearing shall be held upon such notice within 20 business days after a written request therefor by the applicant unless the permit is issued prior to the expiration of such period or the applicant consents to a later date.