Regulations last checked for updates: Sep 13, 2025

Title 19 - Customs Duties last revised: Sep 08, 2025
authority: 5 U.S.C. 301; 19 U.S.C. 66,1202,Harmonized,1551,1552,1553,1623,1624; Section 18.1 also issued under 19 U.S.C. 1484,1557,1490; Section 18.2 also issued under 19 U.S.C. 1551a; Section 18.3 also issued under 19 U.S.C. 1565; Section 18.4 also issued under 19 U.S.C. 1322,1323; Section 18.7 also issued under 19 U.S.C. 1490,1557; 1646a; Section 18.11 also issued under 19 U.S.C. 1484; Section 18.12 also issued under 19 U.S.C. 1448,1484,1490; Section 18.13 also issued under 19 U.S.C. 1498(a); Section 18.14 also issued under 19 U.S.C. 1498. Section 18.25 also issued under 19 U.S.C. 1490. Section 18.26 also issued under 19 U.S.C. 1490. Section 18.31 also issued under 19 U.S.C. 1553a.
source: CBP Dec. 17-13, 82 FR 45394, Sept. 28, 2017, unless otherwise noted.