(a)        All recreation space shall be accessible to the residents of the building. In a mixed use building, the recreation space shall be accessible only from the residential portion of the building, or the community facility portion of a building allocated to long-term care facilities or philanthropic or non-profit institutions with sleeping accommodations, as applicable.

(b)        The minimum dimension of any recreation space shall be 15 feet. The minimum size of any outdoor recreation space shall be 225 square feet, and the minimum size of any indoor recreation space shall be 300 square feet.

(c)        Outdoor recreation space shall be open to the sky except that building projections, not to exceed seven feet in depth, may cover up to 10 percent of the outdoor recreation space, provided that the lowest level of the projection is at least 10 feet above the level of the outdoor recreation space.

(d)        Any indoor recreation room located in a story shall have at least one exterior wall with windows, or ceiling with skylights, that measures not less than 9.5 percent of the total floor space of the room. Where windows are provided to meet such requirement, they shall face a street, yard or court that meets the applicable regulations set forth in Article II, Chapter 3. Where skylights are provided to meet such requirement, they shall be located in a yard or court that meets the applicable regulations set forth in Article II, Chapter 3 and shall be unobstructed from their lowest level to the sky, except for permitted obstructions set forth in Section 23-87 (Permitted Obstructions in Courts).