; (B) supplied during the period beginning January 1, 2024, and ending December 31, 2028, exceeds 65 percent of the cost of the manufactured articles, materials, or supplies; and (C) supplied on or after January 1, 2029, exceeds 75 percent of the cost of the manufactured articles, materials, or supplies. (2) Exclusion for certain manufactured articles Paragraph (1) shall not apply to manufactured articles that consist wholly or predominantly of iron, steel, or a combination of iron and steel. (3) Rulemaking to create a fallback threshold (A) In general Not later than 180 days after the date of the enactment of this Act, the Secretary of Defense shall issue rules to determine the treatment of the lowest price offered for a foreign end product for which 55 percent or more of the component articles, materials, or supplies of such foreign end product are manufactured substantially all from articles, materials, or supplies mined, produced, or manufactured in the United States if— (i) the application paragraph (1) results in an unreasonable cost; or (ii) no offers are submitted to supply manufactured articles, materials, or supplies manufactured substantially all from articles, materials, or supplies mined, produced, or manufactured in the United States. (B) Termination Rules issued under this paragraph shall cease to have force or effect on January 1, 2030. (4) Applicability The requirements of this subsection— (A) shall apply to contracts entered into on or after the date of the enactment of this Act; and (B) shall not apply to a country that is a member of the national technology and industrial base (as defined by section 4801 of title 10, United States Code). (c) Major defense acquisition program defined The term major defense acquisition program has the meaning given in section 4201 of title 10, United States Code.