In the Borough of Manhattan, in the area designated by the former Bellevue South Urban Renewal Plan, for a development or enlargement on a zoning lot that adjoins a zoning lot including a building containing residences with non-complying courts along the common side lot line, the court regulations of Section 23-80 and the open area requirements of paragraph (c) of Section 23-462 (Side yards for all other buildings containing residences) may be modified to allow an open area at least eight feet wide to extend along a portion of the side lot line.