N.Y. Comp. Codes R. & Regs. tit. 19, § 160.12 – Open sources of ignition.

(a) In order to ensure that products or chemicals are not inadvertently ignited, open sources of ignition, flame or sparks, including candles, gas burners and cigarettes, are prohibited. Owners, managers and individual operators shall be responsible for such compliance.
(b) Owners may designate a smoking area for employees and clients. However, such designated area must be separated from the operational areas of the premises and be properly ventilated.