16 CFR Part 303 Rules and Regulations Under the Textile Fiber Products Identification Act: Request For Public Comment on Petition Filed by Mohawk Industries, E.I. du Pont de Nemours and Company, and PTT Poly Canada To Amend Rule 7(c) To Establish A New Generic Fiber Subclass Name and Definition, Within the Existing Definition of "Polyester," For A Specifically Proposed Subclass of Polyester Fibers Made From poly(trimethylene terephthelate) ("PTT").