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Effective Period Rates of Duty Unit of Quantity Article Description Stat. Suf- fix Heading/ Subheading 2 1 Special General Modacrylic staple fibers, not carded, combed or otherwise processed for spinning, containing over 35 percent and less than 85 percent by weight of acrylonitrile, 3.9 decitex (plus or minus 2 percent), natural in color, with fiber length between 38 mm and 120 mm (provided for in subheading 5503.30.00)................................................................................... 1/ 9902.13.22 On or before 12/31/2020 No change No change Free 1/ Acrylic staple fiber (polyacrylonitrile staple), dyed, not carded, combed or otherwise processed for spinning, the foregoing containing by weight 92 percent or more of polyacrylonitrile, not more than 0.01 percent of zinc and 2 percent or more but not over 8 percent of water, with a decitex of 3.3 to 5.6, a fiber shrinkage of from 0 to 22 percent (provided for in subheading 5503.30.00)................................................................................... 1/ 9902.13.23 On or before 12/31/2020 No change No change Free 1/ Artificial staple fibers of viscose rayon, not carded, combed or otherwise processed for spinning and containing 28 percent or more but not over 33 percent by weight of silica (provided for in subheading 5504.10.00); the foregoing other than fibers measuring 2.2 decitex in lengths of 38 mm, measuring 4.7 decitex in lengths of 51 mm or measuring 3.3, 4.7 or 5.0 decitex in lengths of 60 mm....................................................................... 1/ 9902.13.24 On or before 12/31/2020 No change No change Free 1/ Staple fibers of viscose rayon, not carded, combed or otherwise processed for spinning, measuring 0.90 or more but not over 1.30 decitex and having a fiber length each measuring 20 mm or more but not over 150 mm (provided for in subheading 5504.10.00)................................................................................... 1/ 9902.13.25 On or before 12/31/2020 No change No change Free 1/ Artificial staple fibers of viscose rayon, not carded, combed or otherwise processed for spinning, measuring 0.5 or more but not over 1.0 decitex and having a fiber length each measuring 4 mm or more but not over 20 mm (provided for in subheading 5504.10.00) .................................................................................. 1/ 9902.13.26 On or before 12/31/2020 No change No change Free 1/ Flame resistant viscose rayon fibers suitable for yarn spinning, with minimum fiber tenacity of 25 cN/tex, based on modal fiber derived from beechwood and containing 20 to 22 percent by weight of phosphorus-based flame retardant agent (provided for in subheading 5504.10.00).................................................... 1/ 9902.13.27 On or before 12/31/2020 No change No change Free 1/ Viscose rayon staple fibers having a decitex of less than 5.0 and a trilobal multi-limbed cross-section, the limbs having a length-to-width aspect ratio of at least 2:1, suitable for use in producing goods of heading 9619 (provided for in subheading 5504.10.00)................................................................................... 1/ 9902.13.28 On or before 12/31/2020 No change No change 1.7% 1/ Artificial staple fibers of viscose rayon, not carded, combed or otherwise processed for spinning, such fibers containing between 28 percent and 33 percent by weight of silica, measuring 4.7 decitex in lengths of 60 mm (provided for in subheading 5504.10.00).............................................................. 1/ 9902.13.29 On or before 12/31/2020 No change No change Free 1/ 1/ See chapter 99 statistical note 1. Rates of Duty 1 Harmonized Tariff Schedule of the United States Revision 15 (2026) Annotated for Statistical Reporting Purposes XXII 99 - II - 110 Note:The shaded areas indicate the provision has expired