(a) For the purposes of this section the following definitions apply:

(b) If a carpet or rug or small carpet or rug is manufactured, imported, or otherwise marketed or handled which has had a fire-retardant treatment or is made of fibers which have had a fire-retardant treatment, the letter “T” shall be set forth legibly and conspicuously, and shall appear at all times, on each label and/or invoice relating thereto pursuant to the requirements of the Textile Fiber Products Identification Act, 15 U.S.C. 70, et seq., and the rules and regulations thereunder, whether or not such letter “T” appears elsewhere on said product. Samples, pieces, rolls, or squares used to promote or effect the sale of such carpet or rug are subject to the aforementioned requirements. As provided in the applicable portions of the aforesaid act and the rules and regulations thereunder, where a carpet or rug or a small carpet or rug; which has had a fire-retardant treatment or is made of fibers which have had a fire-retardant treatment, is sold to an ultimate consumer and was either custom made or commercially installed for such consumer, the labeling required by this section shall not apply with respect to the carpet or rug if an invoice or other paper relating thereto, containing the letter “T”, legibly and conspicuously written, is delivered to the consumer in due course of business.

(c) No person subject to the Flammable Fabrics Act shall manufacture, import, distribute, or otherwise market or handle any carpet or rug or small carpet or rug, including samples, swatches, or specimens used to promote or effect the sale thereof, which is not in compliance with this section.