U.S. Code / Title 19 — Customs Duties / Chapter 3—the Tariff and Related Provisions / Subtitle Iv—Customs AdministrationTitle 19AdministrativeAdministrative ProvisionsContentspart 1—definitionspart 2—report, entry, and unlading of vessels and vehiclespart 3—ascertainment, collection, and recovery of dutiespart 4—transportation in bond and warehousing of merchandisepart 5—enforcement provisionspart 6—general provisions