Importer, for purposes of this subpart, means the principal party responsible for the import of product into a country. For imports into the United States, and for purposes of this subpart, importer means the consignee as identified on entry documentation or any authorized, equivalent electronic medium required for release of shipments, or any authorized equivalent entry documentation from the customs authority of the United States or the separate customs territory of a U.S. insular possession. If a consignee is not declared, then the importer of record is considered to be the consignee.
50 CFR § 635.2
In addition to the definitions in the Magnuson-Stevens Act, ATCA, and 600.10 of this chapter, the terms used in this part have following meanings. If applicable, the terms used in this part supercede those used in 600.10: