Prohibition of roof-top amenity space. In order to protect the health, safety, welfare and residential character of the Borough, the placement of any decks, platforms, terraces or similar features on the roof of a building, for use as an amenity space for building occupants and/or guests shall be prohibited. Flat roof buildings shall only contain roof-top access and no railings. For purpose of this section, a roof shall mean the exterior covering of a building that bridges the space between exterior walls and shall not include an interior courtyard area that is completely screened by exterior building walls.