41 USC 10b2 - Limitation on authority to waive Buy American Act requirement
(a) Buy American Act waiver rescissions
(1) If the Secretary of Defense, after consultation with the United States Trade Representative, determines that a foreign country which is party to an agreement described in paragraph (2) has violated the terms of the agreement by discriminating against certain types of products produced in the United States that are covered by the agreement, the Secretary of Defense shall rescind the Secretarys blanket waiver of the Buy American Act with respect to such types of products produced in that foreign country.
(2) An agreement referred to in paragraph (1) is any reciprocal defense procurement memorandum of understanding between the United States and a foreign country pursuant to which the Secretary of Defense has prospectively waived the Buy American Act for certain products in that country.