(a) Minimum open space is 40% of gross area. Open space does not include:
(1) Private roads and public rights-of-way;
(2) Parking areas, accessways, and driveways;
(3) Required setbacks between buildings and parking areas;
(4) Required setbacks between buildings and streets;
(5) Minimum spacing between buildings, and between buildings and parking areas;
(6) Private yards; and
(7) Other small fragmented or isolated open space areas.