For purposes of ensuring compliance with the Customs laws of the United States and other laws enforced by the Customs Service, including the provisions of law described in paragraph (2), a Customs officer may, subject to the provisions of this section, stop and search at the border, without a search warrant, mail of domestic origin transmitted for export by the United States Postal Service and foreign mail transiting the United States that is being imported or exported by the United States Postal Service.
19 U.S. Code § 1583. Examination of outbound mail
The Export Administration Act of 1979, referred to in subsecs. (a)(2)(D) and (c)(1)(G), is Pub. L. 96–72, Sept. 29, 1979, 93 Stat. 503, which was classified principally to section 2401 et seq. of the former Appendix to Title 50, War and National Defense, prior to editorial reclassification and renumbering as chapter 56 (§ 4601 et seq.) of Title 50, and was repealed by Pub. L. 115–232, div. A, title XVII, § 1766(a), Aug. 13, 2018, 132 Stat. 2232, except for sections 11A, 11B, and 11C thereof (50 U.S.C. 4611, 4612, 4613).
The International Emergency Economic Powers Act, referred to in subsecs. (a)(2)(F) and (c)(1)(I), is title II of Pub. L. 95–223, Dec. 28, 1977, 91 Stat. 1626, as amended, which is classified generally to chapter 35 (§ 1701 et seq.) of Title 50, War and National Defense. For complete classification of this Act to the Code, see Short Title note set out under section 1701 of Title 50 and Tables.
The Trading with the Enemy Act, referred to in subsec. (c)(1)(J), is act Oct. 6, 1917, ch. 106, 40 Stat. 411, which was classified to sections 1 to 6, 7 to 39, and 41 to 44 of the former Appendix to Title 50, War and National Defense, prior to editorial reclassification and renumbering as chapter 53 (§ 4301 et seq.) of Title 50. For complete classification of this Act to the Code, see Tables.
Rule 41 of the Federal Rules of Criminal Procedure, referred to in subsec. (c)(2)(A), is set out in the Appendix to Title 18, Crimes and Criminal Procedure.
A prior section 1583, acts June 17, 1930, ch. 497, title IV, § 583, 46 Stat. 748; Aug. 2, 1956, ch. 887, § 4(c), 70 Stat. 948, related to delivery and certification of manifest, prior to repeal by Pub. L. 103–182, title VI, § 690(b)(9), Dec. 8, 1993, 107 Stat. 2223.
2004—Subsec. (c)(1). Pub. L. 108–429 realigned margins.
For transfer of functions, personnel, assets, and liabilities of the United States Customs Service of the Department of the Treasury, including functions of the Secretary of the Treasury relating thereto, to the Secretary of Homeland Security, and for treatment of related references, see sections 203(1), 551(d), 552(d), and 557 of Title 6, Domestic Security, and the Department of Homeland Security Reorganization Plan of November 25, 2002, as modified, set out as a note under section 542 of Title 6. For establishment of U.S. Customs and Border Protection in the Department of Homeland Security, treated as if included in Pub. L. 107–296 as of Nov. 25, 2002, see section 211 of Title 6, as amended generally by Pub. L. 114–125, and section 802(b) of Pub. L. 114–125, set out as a note under section 211 of Title 6.
 See References in Text note below.