To amend the Tariff Act of 1930 to strengthen those provisions relating to preventing the circumvention of antidumping and countervailing duty orders.

Amends the Tariff Act of 1930 to authorize the administering authority to include within the scope of an antidumping or countervailing duty order, if specified conditions are met, imported parts or components that constitute certain merchandise sold in the United States and subject to such order, provided such merchandise is: (1) completed or assembled in the United States or third country by a party that is related to, or acting on behalf of, an exporter or producer of the merchandise that is subject to such order; and (2) completed or assembled in the United States or third country from parts or components that are produced in the foreign country to which such order applies by such exporter or producer, or any supplier that has historically supplied such items to them, or any party that supplies such items on behalf of them.