; [(ethenyloxy)methoxy]ethene (CAS Nos. 63450–15–7, 63148–64–1, and 9003–33–2) (provided for in subheading 3905.91.10) Free No change No change On or before 12/31/2020 . 989. D-500 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.03 Aqueous mixtures of poly(vinyl alcohol) (CAS No. 110532–37–1) and poly(vinylpyrrolidone) (CAS No. 9003–39–8) (provided for in subheading 3905.99.80) Free No change No change On or before 12/31/2020 . 990. ACUSOL Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.04 Poly(acrylic acid-co-(sodium 2-(acryloylamino)-2-methyl-1-propanesulfonate) sodium salt) (CAS No. 136903-34-9) in granulated form (provided for in subheading 3906.90.50) Free No change No change On or before 12/31/2020 . 991. Polymeric sulfonic acid Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.05 Poly(ammonium acryloyldimethyl taurate-co-vinyl pyrrolidone) (CAS No. 335383–60–3) (provided for in subheading 3906.90.50) Free No change No change On or before 12/31/2020 . 992. 2-Propenoic acid, sodium salt Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.06 Poly(acrylamide-co-sodium polyacrylate) (CAS No. 25085–02–3) (provided for in subheading 3906.90.50) Free No change No change On or before 12/31/2020 . 993. Poly(butyl methacrylate) Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.07 Poly(butyl methacrylate-co-(2-dimethylaminoethyl) methacrylate-co-methyl methacrylate) 1:2:1 (CAS No. 24938–16–7) (provided for in subheading 3906.90.50) Free No change No change On or before 12/31/2020 . 994. Poly(ethyl acrylate-co-methyl methacrylate) Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.08 Poly(ethyl acrylate-co-methyl methacrylate-co-trimethylammonioethyl methacrylate