The chief police officer, in denying an application for a parade permit, shall be empowered to authorize the conduct of the parade on a date, at a time, or over a route different than that named by the applicant. An applicant desiring to accept an alternate permit shall, within three days after notice of the action of the chief police officer, file a written notice of his acceptance with the chief police officer. An alternate parade permit shall conform to the requirements of, and shall have the effect of, a parade permit under this subchapter.