PUBLIC LAW 107-210—AUG. 6, 2002 116 STAT. 1005 (i) a reduction of 3 percent ad valorem or a reduction of one-tenth of the total reduction, whichever is greater, had taken effect on the effective date of the first reduction proclaimed under paragraph (1) to carry out such agreement with respect to such article; and (ii) a reduction equal to the amount applicable under clause (i) had taken effect at 1-year intervals after the effective date of such first reduction. (B) EXEMPTION FROM STAGING.— No staging is required under subparagraph (A) with respect to a duty reduction that is proclaimed under paragraph (1) for an article of a kind that is not produced in the United States. The United States International Trade Commission shall advise the President of the identity of articles that may be exempted from staging under this subparagraph. (4) ROUNDING.—I f the President determines that such action will simplify the computation of reductions under paragraph (3), the President may round an annual reduction by an amount equal to the lesser of— (A) the difference between the reduction without regard to this paragraph and the next lower whole number; or (B) one-half of 1 percent ad valorem. (5) OTHER LIMITATIONS. —A rate of duty reduction that may not be proclaimed by reason of paragraph (2) may take effect only if a provision authorizing such reduction is included within an implementing bill provided for under section 2105 and that bill is enacted into law. (6) OTHER TARIFF MODIFICATIONS.— Notwithstanding paragraphs (1)(B), (2)(A), (2)(C), and (3) through (5), and subject to the consultation and layover requirements of section 115 of the Uruguay Round Agreements Act, the President may proclaim the modification of any duty or staged rate reduction of any duty set forth in Schedule XX, as defined in section 2(5) of that Act, if the United States agrees to such modification or staged rate reduction in a negotiation for the reciprocal elimination or harmonization of duties under the auspices of the World Trade Organization. (7) AUTHORITY UNDER URUGUAY ROUND AGREEMENTS ACT NOT AFFECTED.—Nothing in this subsection shall limit the authority provided to the President under section 111(b) of the Uruguay Round Agreements Act (19 U.S.C. 3521(b)). (b) AGREEMENTS REGARDING TARIFF AND NONTARIFF BAR- RIERS.— (1) IN GENERAL. —(A) Whenever the President determines that— (i) one or more existing duties or any other import restriction of any foreign country or the United States or any other barrier to, or other distortion of, international trade unduly burdens or restricts the foreign trade of the United States or adversely affects the United States economy, or (ii) the imposition of any such barrier or distortion is likely to result in such a burden, restriction, or effect, and that the purposes, policies, priorities, and objectives of this title will be promoted thereby, the President may enter into a trade agreement described in subparagraph (B) during the period described in subparagraph (C).