The word “rules” is omitted as being synonymous with “regulations”.

2015—Pub. L. 114–94 amended section generally. Prior to amendment, section related to United States Government’s share of costs incurred by a State.

2012—Subsec. (a). Pub. L. 112–141, § 32933(c), substituted “section 31102(b)(2)(E)” for “section 31102(b)(1)(E)”.

Subsec. (b). Pub. L. 112–141, § 32933(d), struck out “authorized by section 31104(f)(2)” after “public education activities”.

2005—Subsec. (a). Pub. L. 109–59 substituted “31102(b)(1)(E)” for “31102(b)(1)(D)” and inserted before last sentence “Amounts generated under the unified carrier registration agreement under section 14504a and received by a State and used for motor carrier safety purposes may be included as part of the State’s share not provided by the United States.”

1998—Pub. L. 105–178 designated existing provisions as subsec. (a), inserted subsec. heading, inserted “improve commercial motor vehicle safety and” after “implementing programs to”, and added subsec. (b).

Amendment by Pub. L. 114–94 effective Oct. 1, 2016, subject to a transition provision, see section 5101(f), (g) of Pub. L. 114–94, set out as Effective Date of 2015 Amendment and Transition notes under section 31102 of this title.

Amendment by Pub. L. 112–141 effective Oct. 1, 2012, see section 3(a) of Pub. L. 112–141, set out as an Effective and Termination Dates of 2012 Amendment note under section 101 of Title 23, Highways.

Period of availability during which a recipient may expend grant amounts under this section extended for amounts awarded for fiscal years 2019 and 2020, see section 441 of div. N of Pub. L. 116–260, set out as a note under section 31102 of this title.

Except as provided in sections 14504, 14504a, and 14506 of this title, subtitle C (§§ 4301–4308) of title IV of Pub. L. 109–59 is not intended to prohibit any State or any political subdivision of any State from enacting, imposing, or enforcing any law or regulation with respect to a motor carrier, motor private carrier, broker, freight forwarder, or leasing company that is not otherwise prohibited by law, see section 4302 of Pub. L. 109–59, set out as a note under section 13902 of this title.