No nonconforming use, building or structure, except when required by law or ordinance shall be enlarged, extended, reconstructed or structurally altered, unless such use is changed to a use permitted in the district. Notwithstanding anything contained herein to the contrary, an area occupied by a nonconforming use may be maintained and repaired as necessary to preserve its business vitality.
A nonconforming lot of record may be constructed upon if all other means of lot consolidation have been exhausted, if approved by the planning and zoning commission. If approved, the proportional reduction of the minimum side and rear yard setbacks shall be applied as based on the percentage difference between the nonconforming lot of record and the minimum lot size required for the district in which the lot is located. The front yard setback shall not deviate from that which has been established by the district in which the lot is located or as measured at the two (2) adjacent lots.