Any property that has two (2) or more existing dwellings that were built prior to May 20, 1968, or were principal permitted dwellings approved in accord with the zoning regulations that were in effect at the time such dwellings were built, shall be deemed a nonconforming use. Each dwelling shall be subject to the standards in section 8-1B-4 of this title. (Ord. 389, 6-14-2000)