N.Y. Multiple Residence Law § 201

§ 201. Requirements for fireproof construction. 1. Every new multiple\ndwelling exceeding six stories or seventy-five feet in height shall be\nfireproof.\n 2. The foregoing requirements shall not be construed as prohibiting:\n a. Elsewhere than within, or in the openings to, the public halls,\nstairs and shafts, the use of wood for sleepers, grounds, nailing\nblocks, underflooring, finish flooring, interior doors with their\nassemblies and saddles, floor base not more than one foot in height,\npicture and wall moulding, shelving, closet and kitchen fixtures,\ncupboards, cabinets and wardrobes.\n b. The use of wood for window and for interior trim and finish backed\nsolidly against, or filled with, incombustible material and elsewhere\nthan within, or in the openings to, the public halls, stairs and shafts.\n