In all districts, for buildings containing multiple dwelling residences on zoning lots that adjoin a public park, the minimum distance between a legally required window and a lot line need not apply to portions of buildings facing such public park where the Commissioner of the Department of Parks and Recreation determines that the public park will provide sufficient access to light and air for such building’s legally required windows. Where the Commissioner makes such determination, the public park shall be considered a street for the purposes of applying other applicable laws or statutes to such legally required window.