12/31/2020 . 1050. Ion-exchange resin comprised of divinylbenzene co-polymerized with styrene and ethylstyrene Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.66 Ion-exchange resin comprised of divinylbenzene co-polymerized with styrene and ethylstyrene (CAS No. 9052–95–3) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60) 1.4% No change No change On or before 12/31/2020 . 1051. Ion-exchange resin comprised of a copolymer of methacrylic acid cross-linked with divinylbenzene Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.67 Ion-exchange resin comprised of a copolymer of methacrylic acid cross-linked with divinylbenzene, in the hydrogen ionic form (CAS No. 50602–21–6) (provided for in subheading 3914.00.60) Free No change No change On or before 12/31/2020 . 1052. Ion-exchange resin utilizing a type I quaternary ammonium functional group Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.68 Ion-exchange resin utilizing a type I quaternary ammonium functional group consisting of benzene (chloromethyl)ethenyl-, polymer with diethenylbenzene, compound with N,N-diethylethanamine (CAS No. 63453–90–7) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60) Free No change No change On or before 12/31/2020 . 1053. Ion-exchange resin, free base form Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.69 Ion-exchange resin, free base form, utilizing a tertiary amine functional group consisting of 2-propenamide, N-[3-(dimethylamino)propyl]-, polymer with diethenylbenzene and 1,1′-[oxybis(2,1-ethanediyloxy)]bis[ethene] (CAS No. 65899–87–8) in spherical beads with a mean particle size between 0.30 and 1.20 mm (provided for in subheading 3914.00.60) Free No change No change On or