The Chief of Police or other authorized city official, 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 alternative permit shall file the 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.