The Chief of Police or other authorized city official, in denying an application for a parade pennit, 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 file a written notice of his acceptance. An alternate parade permit shall conform to the requirements of, and shall have the effect of, a parade permit under this subchapter.