U.S. Code
Regulations
Constitution
Sort by Rank
Titles Ascending
Titles Descending
10 per page
25 Result/page
50 Result/page
x
Search
Search guide
U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
All Titles
Title 19
Chapter I
Part 145
Subpart A - Subpart A—General Provisions
§ 145.1 - Definitions.
§ 145.2 - Mail subject to Customs examination.
§ 145.3 - Opening of letter class mail; reading of correspondence prohibited.
§ 145.4 - Dutiable merchandise without declaration or invoice, prohibited merchandise, and merchandise imported contrary to law.
§ 145.5 - Undeliverable packages.
Download the GovRegs app!
