No existing publicly accessible open area or other public amenity, open or enclosed, for which a floor area bonus has been utilized shall be eliminated or reduced in size, except by special permit of the City Planning Commission, pursuant to Section 74-761 (Elimination or reduction in size of public amenities).

Any existing open area for which a floor area bonus has not been utilized that occupies the same zoning lot as an existing publicly accessible open area or other public amenity, open or enclosed, for which a floor area bonus has been utilized, may be reduced in size or eliminated only upon certification of the Chairperson of the City Planning Commission that all bonused amenities comply with the standards under which such floor area bonus was granted.