II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.71 C 12 -C 18 alkenes, polymers with 4-methyl-1-pentene (CAS Nos. 25155–83–3, 81229–87–0 and 103908–22–1) (provided for in subheading 3902.90.00) Free No change No change On or before 12/31/2020 . 960. Alpha-Alkenes (C20-C24) maleic anhyd Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.72 alpha-Alkenes (C 20 -C 24 ) maleic anhydride-4-amino-2,2,6,6-tetramethylpiperidine, polymer (CAS No. 152261–33–1) (provided for in subheading 3902.90.00) Free No change No change On or before 12/31/2020 . 961. Non-functionalized polybutadiene Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.73 Oligomeric poly(butadiene) (CAS No. 68441–52–1) (provided for in subheading 3902.90.00) Free No change No change On or before 12/31/2020 . 962. Vinylacetate-vinylchloride copolymer Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.75 Poly(vinyl acetate-co-vinyl chloride) (CAS No. 9003–22–9) (provided for in subheading 3904.30.60) Free No change No change On or before 12/31/2020 . 963. Poly(fumaric acid-co-vinyl acetate-co-vinyl chloride) Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.76 Poly(fumaric acid-co-vinyl acetate-co-vinyl chloride) (CAS No. 32650–26–3) (provided for in subheading 3904.30.60) Free No change No change On or before 12/31/2020 . 964. Vinyl chloride copolymer Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.77 Poly(dibutyl (2Z)-2-butenedioate-co-vinyl chloride-co-2-hydroxypropyl acrylate) (CAS No. 114653–42–8) (provided for in subheading 3904.40.00) Free No change No change On or before 12/31/2020 . 965. Vinyl chloride-hydroxypropyl acrylate copolymer Subchapter II of chapter 99 is amended by inserting in numerical sequence