Public Law 110–28, referred to in subsec. (n)(4), is Pub. L. 110–28, May 25, 2007, 121 Stat. 112, known as the U.S. Troop Readinesss, Veterans’ Care, Katrina Recovery, and Iraq Accountability Appropriations Act, 2007. For complete classification of this Act to the Code, see Tables.

2021—Subsec. (b)(2)(A). Pub. L. 117–81, § 6420, inserted “and associated backfill” after “security training”.

Subsecs. (m), (n). Pub. L. 117–81, § 6421, added subsec. (m) and redesignated former subsec. (m) as (n).