2018—Pub. L. 115–254, § 1991(d)(19)(B), substituted “Administrator of the Transportation Security Administration” for “Under Secretary” wherever appearing.

Subsec. (a). Pub. L. 115–254, § 1991(d)(19)(A), in introductory provisions, substituted “Administrator of the Transportation Security Administration” for “Under Secretary for Border and Transportation Security of the Department of Homeland Security”.

Subsec. (e). Pub. L. 115–254, § 1991(d)(19)(C), struck out par. (1) designation and heading before “The Government’s share” and struck out par. (2). Prior to amendment, text of par. (2) read as follows: “The Under Secretary shall revise letters of intent issued before the date of enactment of this section to reflect the cost share established in this subsection with respect to grants made after September 30, 2003.”

Subsec. (j). Pub. L. 115–254, § 1991(d)(19)(D), struck out subsec. (j) which authorized appropriations for fiscal years 2005 to 2011.

2007—Subsec. (a). Pub. L. 110–53, § 1604(a)(1), substituted “shall make” for “may make” in introductory provisions.

Subsec. (d)(1). Pub. L. 110–53, § 1604(a)(2), substituted “shall issue” for “may issue”.

Subsec. (h)(1). Pub. L. 110–53, § 1604(a)(3), substituted “2028” for “2007”.

Subsec. (h)(2), (3). Pub. L. 110–53, § 1604(a)(4), added pars. (2) and (3) and struck out former pars. (2) and (3) which related to allocation of $125,000,000 of amount available per fiscal year for large, medium, and small hub airports, nonhub airports, and on the basis of aviation security risks, and allocation of $125,000,000 of amount available per fiscal year for discretionary grants, with priority given to fulfilling letters of intent issued under subsec. (d).

Subsec. (i). Pub. L. 110–53, § 1604(a)(6), added subsec. (i). Former subsec. (i) redesignated (j).

Subsec. (i)(1). Pub. L. 110–53, § 1603(a), substituted “2007, and $450,000,000 for each of fiscal years 2008 through 2011” for “2007.”

Subsec. (j). Pub. L. 110–53, § 1604(a)(5), redesignated subsec. (i) as (j).

2004—Subsec. (i)(1). Pub. L. 108–458 substituted “$400,000,000 for each of fiscal years 2005, 2006, and 2007” for “$250,000,000 for each of fiscal years 2004 through 2007”.

Section applicable only to fiscal years beginning after Sept. 30, 2003, except as otherwise specifically provided, see section 3 of Pub. L. 108–176, set out as an Effective Date of 2003 Amendment note under section 106 of this title.

Pub. L. 110–53, title XVI, § 1604(b), Aug. 3, 2007, 121 Stat. 480, required the Administrator of the Transportation Security Administration to establish a prioritization schedule for airport security improvement projects described in this section based on risk and other relevant factors, to be funded under this section, and to provide to Congress, not later than 180 days after Aug. 3, 2007, a copy of the prioritization schedule, a corresponding timeline, and a description of the funding allocation under this section.

Pub. L. 108–458, title IV, § 4019(e)(2), Dec. 17, 2004, 118 Stat. 3722, provided that: “Notwithstanding any other provision of law, the Secretary [of Homeland Security] may provide that the period of reimbursement under any letter of intent may extend for a period not to exceed 10 years after the date that the Secretary issues such letter, subject to the availability of appropriations. This paragraph applies to letters of intent issued under section 44923 of title 49, United States Code, and letters of intent issued under section 367 of the Department of Transportation and Related Agencies Appropriation Act, 2003 [Pub. L. 108–7, div. I] (49 U.S.C. 47110 note).”