restriction shall not apply to the purchase of commercial products , as defined by section 103 of title 41, United States Code, except that the restriction shall apply to ball or roller bearings purchased as end items. 8034. In addition to any other funds made available for such purposes, there is appropriated $207,629,000, for an additional amount for the National Defense Stockpile Transaction Fund , to remain available until September 30, 2026, for activities pursuant to the Strategic and Critical Materials Stock Piling Act ( 50 U.S.C. 98 et seq. ): Provided, That none of the funds provided under this section may be obligated or expended until 30 days after the Secretary of Defense provides the Committees on Appropriations of the House of Representatives and the Senate a detailed execution plan for such funds. 8035. None of the funds in this Act may be used to purchase any supercomputer which is not manufactured in the United States, unless the Secretary of Defense certifies to the congressional defense committees that such an acquisition must be made in order to acquire capability for national security purposes that is not available from United States manufacturers. 8036. (a) The Secretary of Defense may, on a case-by-case basis, waive with respect to a foreign country each limitation on the procurement of defense items from foreign sources provided in law if the Secretary determines that the application of the limitation with respect to that country would invalidate cooperative programs entered into between the Department of Defense and the foreign country, or would invalidate reciprocal trade agreements for the procurement of defense items entered into under section 2531 of title 10, United States Code, and the country does not discriminate against the same or similar defense items produced in the United States for that country. (b) Subsection (a) applies with respect to— (1) contracts and subcontracts entered into on or after the date of the enactment of this Act