in subheading 2930.90.29) Free No change No change On or before 12/31/2024 . 4307. Methylene bis thiocyanate Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.21.12 Thiocyanatomethyl thiocyanate (CAS No. 6317–18–6) (provided for in subheading 2930.90.30) Free No change No change On or before 12/31/2024 . 4308. Oxamyl Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.21.13 Methyl (1Z)-2-(dimethylamino)-N-(methylcarbamoyloxy)-2-oxoethanimidothioate (CAS No. 23135–22–0) (provided for in subheading 2930.90.43) Free No change No change On or before 12/31/2024 . 4309. L-Cystine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.21.14 (2R)-2-Amino-3-[[(2R)-2-amino-2-carboxyethyl]disulfanyl]propanoic acid (CAS No. 56–89–3) (provided for in subheading 2930.90.49) Free No change No change On or before 12/31/2024 . 4310. L-Cysteine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.21.15 (2R)-2-Amino-3-sulfanylpropanoic acid (L-cysteine) (CAS No. 52–90–4) (provided for in subheading 2930.90.49) Free No change No change On or before 12/31/2024 . 4311. N,N′-Bis-L-alanyl-L-cystine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.21.16 2-(2-Aminopropanoylamino)-3-[[2-(2-aminopropanoylamino)-2-carboxyethyl]disulfanyl]propanoic acid (N,N′-bis-L-alanyl-L-cystine) (CAS No. 115888–13–6) (provided for in subheading 2930.90.49) Free No change No change On or before 12/31/2024 . 4312. Lubricant additive Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.21.17 3-[bis(2-Methylpropoxy)phosphinothioylsulfanyl]-2-methylpropanoic acid (CAS No. 268567–32–4) (provided for in subheading 2930.90.49) Free No change No change On or before 12/31/2024 . 4313. Sodium benzenesulfinate Subchapter II of chapter 99 is amended