; and (B) an analysis of how, if at all, those differences may contribute to the risks identified in paragraph (1); and (3) an assessment of— (A) the use of the authority provided under subclause (II) of section 343(a)(3)(K)(vi) of the Trade Act of 2002 ( 19 U.S.C. 1415(a)(3)(K)(vi) ) to exclude countries from the requirement under subclause (I) of that section that advance information be provided for 100 percent of international mail shipments; and (B) whether the use of that authority should be decreased during the period before that authority terminates under subclause (V) of that section (as added by section 3). 9. Severability If any provision of or amendment made by this Act, or the application of such provision or amendment to any person or circumstance, is held to be unconstitutional, the remainder of the provisions of and amendments made by this Act, and the application of such provisions and amendments to any person or circumstance, shall not be affected.