(provided for in subheading 2934.99.15) Free No change No change On or before 12/31/2020 . 617. Heterocyclic:other: herbicides: topramezone Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.25 [3-(4,5-Dihydro-1,2-oxazol-3-yl)-4-mesyl-o-tolyl](5-hydroxy-1-methylpyrazol-4-yl)methanone (Topramezone) (CAS No. 210631–68–8) (provided for in subheading 2934.99.15) 4.8% No change No change On or before 12/31/2020 . 618. Pinoxaden Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.26 8-(2,6-Diethyl-4-methylphenyl)-1,2,4,5-tetrahydro-7-oxo-7H-pyrazolo[1,2-d][1,4,5]oxadiazepin-9-yl-2,2-dimethylpropanoate (Pinoxaden) (CAS No. 243973–20–8) (provided for in subheading 2934.99.15) 5.2% No change No change On or before 12/31/2020 . 619. Isoxaben technical herbicide Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.27 2,6-Dimethoxy-N-[3-(3-methyl-3-pentanyl)-1,2-oxazol-5-yl]benzamide (isoxaben) (CAS No. 82558–50–7) (provided for in subheading 2934.99.15) 3.1% No change No change On or before 12/31/2020 . 620. Clomazone Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.28 2-(2-Chlorobenzyl)-4,4-dimethyl-1,2-oxazolidin-3-one (Clomazone) (CAS No. 81777–89–1) (provided for in subheading 2934.99.15) and any formulations containing such compound (provided for in subheading 3808.93.15) Free No change No change On or before 12/31/2020 . 621. Fluthiacetmethyl Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.07.29 Methyl[[2-chloro-4-fluoro-5[ (tetrahydro-3-oxo-1H, 3H-[1,3,4] thiadiazolo[3,4-a] pyridazin-1-ylidene)amino]phenyl]thio] acetate (Fluthiacet-methyl technical)(CAS No. 117337–19–6) (provided for in subheading 2934.99.15) Free No change No change On or before 12/31/2020 . 622. Flumioxazin Subchapter II of chapter 99 is amended by inserting in