Subject to the limitations of subsection (c), and within the limitation of appropriations made for the purpose, the Secretary of Defense, the Inspector General of the Department of Defense, and the Secretary of a military department within his department, may provide for any emergency or extraordinary expense which cannot be anticipated or classified. When it is so provided in such an appropriation, the funds may be spent on approval or authority of the Secretary concerned or the Inspector General for any purpose he determines to be proper, and such a determination is final and conclusive upon the accounting officers of the United States. The Secretary concerned or the Inspector General may certify the amount of any such expenditure authorized by him that he considers advisable not to specify, and his certificate is sufficient voucher for the expenditure of that amount.

The authority conferred by this section may be delegated by the Secretary of Defense to any person in the Department of Defense, by the Inspector General to any person in the Office of the Inspector General, or by the Secretary of a military department to any person within his department, with or without the authority to make successive re­delegations.

Funds may not be obligated or expended in an amount in excess of $500,000 under the authority of subsection (a) or (b) until the Secretary of Defense has notified congressional defense committees [1] of the intent to obligate or expend the funds, and—

Funds may not be obligated or expended in an amount in excess of $500,000 under the authority of subsection (a) or (b) until the Secretary of Defense has notified congressional defense committees [1] of the intent to obligate or expend the funds, and—

(A) in the case of an obligation or expenditure in excess of $1,000,000, 15 days have elapsed since the date of the notification; or

(B) in the case of an obligation or expenditure in excess of $500,000, but not in excess of $1,000,000, 5 days have elapsed since the date of the notification.

(2) Subparagraph (A) or (B) of paragraph (1) shall not apply to an obligation or expenditure of funds otherwise covered by such subparagraph if the Secretary of Defense determines that the national security objectives of the United States will be compromised by the application of the subparagraph to the obligation or expenditure. If the Secretary makes a determination with respect to an obligation or expenditure under the preceding sentence, the Secretary shall immediately notify the committees referred to in paragraph (1) that such obligation or expenditure is necessary and provide any relevant information (in classified form, if necessary) jointly to the chairman and ranking minority member (or their designees) of such committees.

(3) A notification under paragraph (1) and information referred to in paragraph (2) shall include the amount to be obligated or expended, as the case may be, and the purpose of the obligation or expenditure.

Notwithstanding paragraph (1), funds may not be obligated or expended in an amount in excess of $100,000 under the authority of subsection (a) or (b) for intelligence or counter-intelligence activities until the Secretary of Defense has notified the congressional defense committees and the congressional intelligence committees of the intent to obligate or expend the funds and 15 days have elapsed since the date of the notification.

(A) Notwithstanding paragraph (1), funds may not be obligated or expended in an amount in excess of $100,000 under the authority of subsection (a) or (b) for intelligence or counter-intelligence activities until the Secretary of Defense has notified the congressional defense committees and the congressional intelligence committees of the intent to obligate or expend the funds and 15 days have elapsed since the date of the notification.

(B) The Secretary of Defense may waive subparagraph (A) if the Secretary determines that such a waiver is necessary due to extraordinary circumstances that affect the national security of the United States. If the Secretary issues a waiver under this subparagraph, the Secretary shall submit to the congressional defense and congressional intelligence committees, by not later than 48 hours after issuing the waiver, written notice of and justification for the waiver.

Not later than December 1 each year, the Secretary of Defense shall submit—

Not later than December 1 each year, the Secretary of Defense shall submit—

(A) to the congressional defense committees a report on all expenditures during the preceding fiscal year under subsections (a) and (b); and

(B) to the congressional intelligence committees a report on expenditures relating to intelligence and counter-intelligence during the preceding fiscal year under subsections (a) and (b).

(2) Each report required to be submitted under paragraph (1) shall include a detailed explanation, by category of activity and approving authority (the Secretary of Defense, the Inspector General of the Department of Defense, and the Secretary of a military department), of the expenditures during the preceding fiscal year.

In this section, the term “congressional intelligence committees” means the Permanent Select Committee on Intelligence of the House of Representatives and the Select Committee on Intelligence of the Senate.

(Added Pub. L. 94–106, title VIII, § 804(a), Oct. 7, 1975, 89 Stat. 538, § 140; amended Pub. L. 98–94, title XII, § 1268(2), Sept. 24, 1983, 97 Stat. 705; renumbered § 127 and amended Pub. L. 99–433, title I, §§ 101(a)(3), 110(d)(4), Oct. 1, 1986, 100 Stat. 994, 1002; Pub. L. 103–160, div. A, title III, § 361, Nov. 30, 1993, 107 Stat. 1627; Pub. L. 103–337, div. A, title III, § 378, Oct. 5, 1994, 108 Stat. 2737; Pub. L. 104–106, div. A, title IX, § 915, title XV, § 1502(a)(5), Feb. 10, 1996, 110 Stat. 413, 502; Pub. L. 106–65, div. A, title X, § 1067(1), Oct. 5, 1999, 113 Stat. 774; Pub. L. 108–136, div. A, title X, § 1031(a)(2), Nov. 24, 2003, 117 Stat. 1596; Pub. L. 115–91, div. A, title X, §§ 1041(a)–(c), 1081(a)(4), Dec. 12, 2017, 131 Stat. 1552, 1553, 1594.)