following new heading: 9902.04.23 N-[3-(Dimethylamino)propyl]-2-methylacrylamide (CAS No. 5205–93–6) (provided for in subheading 2924.19.11) Free No change No change On or before 12/31/2020 . 319. Tetra-n-butylurea Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.24 1,1,3,3-Tetrabutylurea (CAS No. 4559–86–8) (provided for in subheading 2924.19.11) Free No change No change On or before 12/31/2020 . 320. DAAM Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.25 N-(2-Methyl-4-oxo-2-pentanyl)acrylamide (CAS No. 2873–97–4) (provided for in subheading 2924.19.11) Free No change No change On or before 12/31/2020 . 321. Primid QM-1260 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.26 N,N,N',N'-Tetrakis(2-hydroxypropyl)-adipamide (CAS No. 57843–53–5) (provided for in subheading 2924.19.80) Free No change No change On or before 12/31/2020 . 322. Primid XL-552 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.27 N,N,N',N'-Tetrakis(2-2-hydroxyethyl)-adipamide (CAS No. 6334–25–4) (provided for in subheading 2924.19.80) Free No change No change On or before 12/31/2020 . 323. Dichlormid Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.28 2,2-Dichloro-N,N-bis(prop-2-enyl)acetamide (Dichlormid) (CAS No. 37764–25–3) (provided for in subheading 2924.19.80) Free No change No change On or before 12/31/2020 . 324. Propargyl butycarbamate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.29 2-Propyn-1-yl butylcarbamate (CAS No. 76114–73–3) (provided for in subheading 2924.19.80) 0.8% No change No change On or before 12/31/2020 . 325. Diuron Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.04.30