N.Y. Comp. Codes R. & Regs. tit. 6, § 218-7.4
(a) As used in this section, the terms advertise and advertisement include, but are not limited to, any notice, announcement, information, publication, catalog, listing for sale, or other statement concerning a product or service communicated to the public for the purpose of furthering the sale of the product or service.
(1) It is unlawful for any person or company doing business solely in New York or advertising only in New York to advertise any device, apparatus, or mechanism which alters or modifies the original design or performance of any required air contaminant emission control system unless such part, apparatus, or mechanism has been exempted from the requirements of section 218-7.2(b) of this Subpart, and the limitations of the exemption, if any, are contained within the advertisement in type size to give reasonable notice of such limitations.
(ii) It is unlawful for any person to advertise, offer for sale, sell or install an add-on or modified part as a replacement part.
(3)
(2)
(b)