N.J. Stat. § 2A:123-12
The penalties provided for a violation of this act shall not apply to any person who establishes (1) a guaranty received in good faith, signed by and containing the name and address of the person by whom the fabric or wearing apparel covered by the guaranty was manufactured or from whom it was received, to the effect that reasonable and representative tests made under the rules and regulations in accordance with the procedures prescribed in this act show that the specific type of fabric covered by the guaranty and used in the wearing apparel or fabric covered by the guaranty when so tested was not highly flammable within the meaning of this act; and (2), that he has not, by further processing affected the flammability of the fabric or wearing apparel covered by the guaranty which he received. Such guaranty shall either be (1) a separate guaranty specifically designating the wearing apparel or fabric guaranteed, in which case it may be on the invoice or other paper relating to such wearing apparel or fabric; or (2) continuing guaranty filed with the commissioner or with the Federal Trade Commission applicable to any wearing apparel or fabric handled by the guarantor in such form as the commissioner or the Federal Trade Commission, as the case may be, by rules and regulations, may prescribe. It is provided, however, that a person furnishing such a guaranty (except a person relying upon a guaranty received in good faith to furnish a guaranty to the same effect, if he, by further processing, has not affected the flammability of the wearing apparel or fabric covered by the guaranty) shall not be relieved thereby from any of the penalties prescribed for the violations of this act.
N.J.S. § 2A:123-12