No order may be entered under Section 25232, 25232.1, or 25252 except after notice to the person affected thereby of the intention of the commissioner to enter that order and of the reasons therefor and that upon receipt of a request the matter shall be set down for hearing to commence within 15 business days after that receipt unless the person affected consents to a later date. If no hearing is requested within 30 days after the mailing of that notice and none is ordered by the commissioner, the order may be entered without hearing to remain in effect until it is modified or vacated by the commissioner. In the case of an original application for a certificate, such a hearing shall be set down to commence within 15 business days after receipt of a written request by the applicant made 30 days or more after the filing of the application, even though no such notice by the commissioner has been given, unless the applicant consents to a later date. If a hearing is requested or ordered, it shall be held 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), and the commissioner shall have all of the powers granted thereunder.