heading: 9902.12.90 High tenacity single yarn of viscose rayon, with a decitex less than 1,000 (provided for in subheading 5403.10.30) Free No change No change On or before 12/31/2020 . 1174. High tenacity multiple or cabled rayon yarn Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.12.91 High tenacity multiple (folded) or cabled yarn of viscose rayon (provided for in subheading 5403.10.60) Free No change No change On or before 12/31/2020 . 1175. Single yarn of viscose rayon Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.12.92 Single filament yarn of viscose rayon (other than sewing thread), not put up for retail sale, untwisted or with a twist not exceeding 120 turns per meter (provided for in subheading 5403.31.00) Free No change No change On or before 12/31/2020 . 1176. Twisted yarn of viscose rayon Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.12.93 Single filament yarn of viscose rayon, with a twist exceeding 120 turns/m (provided for in subheading 5403.32.00) Free No change No change On or before 12/31/2020 . 1177. Polypropylene (PP) monofilament Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.12.94 Synthetic monofilament of polypropylene, of 67 decitex or more and of which no cross-sectional dimension exceeds 1 mm (provided for in subheading 5404.19.80) Free No change No change On or before 12/31/2020 . 1178. Nylon monofilament thread Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.12.95 Monofilament of nylon, of 67 decitex or more and with no cross-sectional dimension exceeding 1 mm, the foregoing without consistent diameter (provided for in subheading 5404.19.80) Free No change No change On or before 12/31/2020 . 1179. 80D nylon Subchapter II of chapter 99 is amended by inserting in numerical sequence the following