Section 604 of the Trade Act of 1974, as amended (???Trade Act???) (19 U.S.C. 2483), authorizes the President to embody in the Harmonized Tariff Schedule of the United States (HTS) the substance of the relevant provisions of that Act, and of other Acts affecting import treatment, and actions thereunder, including the removal, modification, continuance, or imposition of any rate of duty or other im