This chapter does not except from its application any person, partnership, association, joint venture or corporation which heretofore may have received a license or permit from the Town of Binghamton in accordance with the ordinance known as "An Ordinance Regulating the Parking and Location of Automobile Trailers and Regulating the Licensing, Location, Erection, Maintenance and Conduct of Automobile Trailer Camps and Tourist Camps," or any earlier or other ordinance of the Town concerning the same subject matter. This chapter applies to any such licensee, subject, however, to any different legal rights of such licensee heretofore established.