; (B) by striking 2.1% and inserting Free ; and (C) by striking 12/31/2020 and inserting 12/31/2024 . (65) Heat-curable epoxy resin mixtures Heading 9902.11.15 is amended— (A) by amending the article description to read as follows: Heat-curable epoxy resin mixtures containing more than 30 percent by weight of 4,4′-(9H-fluorene-9,9-diyl)bis(2-chloroaniline) (CAS No. 107934–68–9) as a curing agent (provided for in subheading 3907.30.00) ; (B) by striking Free and inserting 3.4% ; and (C) by striking 12/31/2020 and inserting 12/31/2024 . (66) Polymer of 1,4-benzenedicarboxylic acid with 1,4-butanediol and hexanedioic acid Heading 9902.11.23 is amended— (A) by amending the article description to read as follows: Polymer of 1,4-benzenedicarboxylic acid with 1,4-butanediol and hexanedioic acid (CAS No. 60961–73–1) (provided for in subheading 3907.99.50) ; (B) by striking 1.6% and inserting 3.6% ; and (C) by striking 12/31/2020 and inserting 12/31/2024 . (67) Set of plastic cutlery wrapped in paper Heading 9902.11.96 is amended— (A) by amending the article description to read as follows: Cutlery of plastics, presented with quantities of identical cutlery items joined together by paper wrapping or paper banding designed for ease of loading in a fully enclosed dispensing system (provided for in subheading 3924.10.40) ; (B) by striking Free and inserting 1.8% ; and (C) by striking 12/31/2020 and inserting 12/31/2024 . (68) Acrylic filament tow with a decitex of 5 to 5.6 Heading 9902.13.04 is amended— (A) by amending the article description to read as follows: Acrylic filament tow containing 85 percent or more by weight of acrylonitrile units and 2 percent or more but not more than 8 percent of water, dyed, such tow with a decitex of 5 to 5.6, an aggregate filament measure in the tow bundle between 660,000 and 1,200,000 and a length greater than 2 m (provided for in subheading 5501.30.00) ; (B) by striking Free and inserting 1.7%