; and (B) by striking 12/31/2020 and inserting 12/31/2024 . (196) Polyvinyl formal resin Heading 9902.11.02 is amended— (A) by amending the article description to read as follows: Polyvinyl formal resin (ethenol; [(ethenyloxy)methoxy]ethene (CAS Nos. 63450–15–7, 63148–64–1, and 9003–33–2) (provided for in subheading 3905.91.10) ; and (B) by striking 12/31/2020 and inserting 12/31/2024 . (197) Soil enhancer Heading 9902.11.11 is amended— (A) by amending the article description to read as follows: Starch-g-poly (propenamide-co-2-propenoic acid) potassium salt (CAS No. 863132–14–3) (provided for in subheading 3906.90.50) ; and (B) by striking 12/31/2020 and inserting 12/31/2024 . (198) UV light absorber Heading 9902.11.12 is amended— (A) by amending the article description to read as follows: Mixtures of α-(3-(3-(2H-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl) -1-oxopropyl)-ω-hydroxy-poly (oxy-1,2-ethanediyl) (CAS No. 104810–48–2); α-(3-(3-(2H-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl) -1-oxopropyl)-ω- (3-(3-(2H-benzotriazol-2-yl) -5-(1,1-dimethylethyl) -4-hydroxyphenyl) -1-oxopropoxy)-poly (oxy-1,2-ethanediyl) (CAS No. 104810–47–1) and polyethylene glycol (CAS No. 25322–68–3) (provided for in subheading 3907.20.00) ; and (B) by striking 12/31/2020 and inserting 12/31/2024 . (199) High-performance dispersant use in concrete Heading 9902.11.13 is amended— (A) by amending the article description to read as follows: Oxirane, 2-methyl-, polymer with oxirane, monoether with 1,2-propanediol mono(2-methyl-2-propenoate) (CAS No. 220846–90–2) (provided for in subheading 3907.20.00) ; and (B) by striking 12/31/2020 and inserting 12/31/2024 . (200) HDI-based polyisocyanate Heading 9902.11.49 is amended— (A) by amending the article description to read as follows: Poly(1,6-diisocyanatohexane)-block-polyethylene-block-poly (1-butoxypropan-2-ol) (CAS No. 125252–47–3) (provided for in subheading 3911.90.90)