II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.50 C 9 -C 15 Perfluorocarbon Amines (CAS No. 86508–42–1) (provided for in subheading 2921.19.61) Free No change No change On or before 12/31/2020 . 247. N,N'-bis(3-aminopropyl)ethylenediamine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.51 N,N'-Bis(3-aminopropyl)ethylenediamine (CAS No. 10563–26–5) (provided for in subheading 2921.29.00) Free No change No change On or before 12/31/2020 . 248. Trimethylhexamethylene diamine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.52 2,4,4-Trimethyl-1,6-hexanediamine (CAS No. 25620–58–0) (provided for in subheading 2921.29.00) Free No change No change On or before 12/31/2020 . 249. N,N-Diethyl-1,3-propanediamine Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.53 N,N-Diethyl-1,3-propanediamine (CAS No. 104–78–9) (provided for in subheading 2921.29.00) Free No change No change On or before 12/31/2020 . 250. 2,4-Dichloroaniline Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.54 2,4-Dichloroaniline (CAS No. 554–00–7) (provided for in subheading 2921.42.18) Free No change No change On or before 12/31/2020 . 251. 4 Chloro-2-nitroaniline Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.55 4-Chloro-2-nitroaniline (CAS No. 89–63–4) (provided for in subheading 2921.42.55) Free No change No change On or before 12/31/2020 . 252. 2-Nitroaniline Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.03.56 2-Nitroaniline (CAS No. 88–74–4) (provided for in subheading 2921.42.55) Free No change No change On or before 12/31/2020 . 253. 3,5-Difluroaniline Subchapter II of chapter 99 is amended by inserting in numerical sequence the following