Where a development is constructed on a zoning lot that contains at least 5,000 square feet of lot area and fronts on a sidewalk containing a stairway entrance or entrances into a subway station, the existing entrance or entrances shall be relocated from the street onto the zoning lot. For the purposes of this Section, a development shall not include an extension. The new entrance or entrances shall be provided in accordance with the provisions of Section 37-40 (OFF-STREET RELOCATION OR RENOVATION OF A SUBWAY STAIR). The subway stations where such improvements are required are listed in the following table and shown on Map 6 (Subway Station Improvement Areas) in Appendix E of this Chapter.