A. Any lot under separate ownership of record prior to the adoption of this title, which has dimensions which would prevent building because of the front yard, rear yard and side yard setbacks required by the zone in which it is located, and any lot which has been approved by the town prior to the effective date hereof, which would prevent building because of the front yard, rear yard and side yard setbacks required by the zone in which it is located, shall be deemed to comply with the requirements of the zone in which it is located. The standards of the international building code for development or construction on or near lot lines must still be met.