(1S,3S)-3-(2,2-dichlorovinyl)-2,2 dimethylcyclopropanecarboxylate and (S)-α-cyano-3-phenoxybenzyl (1R)-cis-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate isomers (α-cypermethrin technical) (CAS No. 67375–30–8) (provided for in subheading 2926.90.30) Free No change No change On or before 12/31/2020 . 371. Zeta-cypermethrin Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.76 (S)-Cyano-(3-phenoxyphenyl)methyl (+)cis-3-(2,2 -dichloroetheny1)-2,2-dimethylcyclopropanecarboxylate and (S)-cyano-(3-phenoxyphenyl)methyl (+)trans-3-(2,2-dichloroetheny1)-2,2-dimethylcyclopropanecarboxylate (Zeta-cypermethrin) (CAS No. 1315501–18–8) (provided for in subheading 2926.90.30) Free No change No change On or before 12/31/2020 . 372. Esfenvalerate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.77 (S)-Cyano(3-phenoxyphenyl)methyl (2S)-2-(4-chlorophenyl)-3-methylbutanoate (Esfenvalerate) (CAS No. 66230–04–4) (provided for in subheading 2926.90.30) Free No change No change On or before 12/31/2020 . 373. Fenpropathrin Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.78 α-Cyano-3-phenoxyphenyl 2,2,3,3-tetramethylcyclopropanecarboxylate (Fenpropathrin) (CAS No. 39515–41–8) (provided in subheading 2926.90.30) Free No change No change On or before 12/31/2020 . 374. Phthalodinitrile CAS 91–15–6 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.79 1,2 Dicyanobenzene (phthalodinitrile) (CAS No. 91–15–6) (provided for in subheading 2926.90.43) Free No change No change On or before 12/31/2020 . 375. Diphenylacetonitrile Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.80 2, 2-Diphenylacetonitrile (CAS No. 86–29–3) (provided for in subheading 2926.90.48) Free No change No change On or before 12/31/2020 . 376. IPN Subchapter II of chapter