N.Y.C. Admin. Code § 27-515: § 27-515 Flame resistance.

(a) Tents. All materials used for tents shall be treated to be flameproofed and shall remain flameproofed in accordance with chapter four of this title.

(b) Air-supported structures. All fabrics that have a base fabric weight of 6.4 oz. per square yard or less or that are used to enclose spaces classified in occupancy group C, E, F, G, H or J shall have an extinction time of not more than two seconds when tested under the small scale test method of reference standard RS 7-3. All other fabrics shall have a flame extinction time of not over one minute and/or a flame spread of not over one inch per minute when tested in accordance with the provisions of reference standard RS 7-4.