(CAS No. 204583–39–1) (provided for in subheading 2933.69.60) Free No change No change On or before 12/31/2020 . 554. Terbutryn Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.06.61 (4E)-4-(Ethylimino)-N-(2-methyl-2-propanyl)-6-(methylsulfanyl)-1,4-dihydro-1,3,5-triazin-2-amine (terbutryn) (CAS No. 886–50–0) (provided for in subheading 2933.69.60) Free No change No change On or before 12/31/2020 . 555. Tris (2-hydroxyethyl) isocyanurate (THEIC) Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.06.62 1,3,5-Tris(2-hydroxyethyl)-1,3,5-triazinane-2,4,6-trione (THEIC) (CAS No. 839–90–7) (provided for in subheading 2933.69.60) Free No change No change On or before 12/31/2020 . 556. 2-Amino-4-methoxy-6-methyl-1,3,5-triazine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.06.63 4-Methoxy-6-methyl-1,3,5-triazin-2-amine (CAS No. 1668–54–8) (provided for in subheading 2933.69.60) Free No change No change On or before 12/31/2020 . 557. 2–Methyl-4-methoxy-6-methylamino-1,3,5-triazine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.06.64 4-Methoxy-N,6-dimethyl-1,3,5-triazin-2-amine (CAS No. 5248–39–5) (provided for in subheading 2933.69.60) Free No change No change On or before 12/31/2020 . 558. Triallyl cyanurate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.06.65 Triallyl cyanurate (2,4,6-tris(allyloxy)-1,3,5-triazine) (CAS No. 101–37–1) (provided for in subheading 2933.69.60) Free No change No change On or before 12/31/2020 . 559. Uniconazole-P Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.06.66 (4Z)-5-(4-Chlorophenyl)-2,2-dimethyl-4- (1H-1,2,4-triazol-1-yl)-4-hexen-3-ol (Uniconazole-P) (CAS No. 83657–17–4) (provided for in subheading 2933.69.60) Free No change No change On or