When a use is not specifically listed in the sections devoted to permitted uses, it shall be assumed that such uses are hereby expressly prohibited unless by a written decision of the plan commission/board of appeals it is determined that said use is similar to and not more objectionable than uses listed. Such uses may then be permitted. (Ord. 76-O-227, 12-2-1976; amd. Ord. 05-O-942, 11-7-2005)