; (2) impose earned value management system requirements for cost contracts or incentive contracts with a value greater than or equal to $20,000,000 and less than $50,000,000; and (3) require a defense contractor to use an earned value management system for contracts awarded with a value greater than or equal to $50,000,000 and less than $100,000,000. (b) Implementation If the Department of Defense Supplement to the Federal Acquisition Regulation is not revised as described in subsection (a) before the deadline specified in such subsection, the Under Secretary of Defense for Acquisition and Sustainment shall provide to the Committees on Armed Services of the Senate and the House of Representatives a briefing on the timeline for such revisions. C Domestic Sourcing Requirements 831. Emergency acquisition authority for purposes of replenishing United States stockpiles Section 3601(a)(1) of title 10, United States Code, is amended— (1) in subparagraph (A)(iv), by striking or at the end; (2) in subparagraph (B), by striking the period at the end and inserting ; or ; and (3) by adding at the end the following new subparagraph: (C) with respect to an armed attack by a country of concern (as defined in section 1(m) of the State Department Basic Authorities Act of 1956 ( 22 U.S.C. 2651a(m) ), to which the United States is not a party, for purposes of— (i) replenishing United States stockpiles of defense articles when such stockpiles are diminished as a result of the United States providing defense articles in response to such armed attack by a country of concern against— (I) a United States ally (as that term is defined in section 201(d) of the Act of December 2, 1942, titled To provide benefits for the injury, disability, death, or enemy detention of employees of contractors with the United States, and for other purposes (56 Stat. 1028, chapter 668; 42 U.S.C. 1711(d) )); or (II) a United States partner