;1RS,3SR)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate (β-Cyfluthrin) (CAS No. 68359–37–5) (provided for in subheading 3808.91.25) Free No change No change On or before 12/31/2020 . 811. Imidacloprid + thiodicarb formulations Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.09.22 Product mixtures containing 1-(6-chloro-3-pyridinyl)methyl-N-nitroimidazolidin-2-ylideneamine (Imidacloprid) (CAS No. 138261–41–3) and 3,7,9,13-tetramethyl-5,11-dioxa-2,8,14-trithia-4,7,9,12-tetraazapentadeca-3,12-diene-6,10-dione (Thiodicarb) (CAS No. 59669–26–0) (provided for in subheading 3808.91.25) Free No change No change On or before 12/31/2020 . 812. Spiromesifen formulations Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.09.23 Product mixtures containing 3-mesityl-2-oxo-1-oxaspiro[4.4]non-3-en-4-yl 3,3-dimethylbutyrate (Spiromesifen) (CAS No. 283594–90–1) (provided for in subheading 3808.91.25) 1.0% No change No change On or before 12/31/2020 . 813. Spirotetramat formulations Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.09.24 Product mixtures containing (5s,8s)-3-(2,5-dimethylphenyl)-8-methoxy-2-oxo-1-azaspiro[4.5]dec-3-en-4-yl ethyl carbonate (Spirotetramat) (CAS No. 203313–25–1) (provided for in subheading 3808.91.25) 5.3% No change No change On or before 12/31/2020 . 814. Clothianidin + β-cyfluthrin formulations Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.09.25 Product mixtures containing 1-(2-chloro-1,3-thiazol-5-ylmethyl)-3-methyl-2-nitroguanidine (Clothianidin) (CAS No. 210880–92–5) and (RS)-α-cyano-4-fluoro-3-phenoxybenzyl (1RS,3RS