Nonconforming by dwelling units

A building or structure containing more dwelling units than are permitted by the use regulations of this ordinance but was established in conformance with the zoning ordinance in effect at the time of construction shall be nonconforming by use. A building or structure containing a permitted number of dwelling units by the use regulations of this ordinance, but not meeting the area and dimensional requirements but was established in conformance with the zoning ordinance in effect at the time of construction, shall be nonconforming by dimension.