Customs Modernization and Tariff Act
Section 1421. Removal, Breakage, and Alteration of Marks. - Any person who, without authority, willfully removes, breaks, injures, defaces or alters any customs seal or other fastening or mark placed upon any vessel, vehicle, on land, sea or air, warehouse or package containing merchandise or baggage in bond or in customs custody, shall be punished with the penalty prescribed in Section 1420 hereof.