Customs Modernization and Tariff Act
Section 117. Regulated Importation and Exportation. - Goods which are subject to regulation shall be imported or exported only after securing the necessary goods declaration or export declaration, clearances, licenses, and any other requirements, prior to importation or exportation. In case of importation, submission of requirements after arrival of the goods but prior to release from customs custody shall be allowed but only in cases provided for by governing laws or regulations.