The Motor Carrier Safety Improvement Act of 1999, referred to in subsec. (a)(2)(B), is Pub. L. 106–159, Dec. 9, 1999, 113 Stat. 1748. For complete classification of this Act to the Code, see Short Title of 1999 Amendment note set out under section 101 of this title and Tables.

The date of enactment of this section, referred to in subsec. (a)(4), is the date of enactment of Pub. L. 109–59, which was approved Aug. 10, 2005.

A prior section 31313, Pub. L. 103–272, § 1(e), July 5, 1994, 108 Stat. 1027, related to grants for issuing commercial drivers’ licenses and complying with State participation requirements, prior to repeal by Pub. L. 105–178, title IV, § 4011(f), June 9, 1998, 112 Stat. 408.