---
kind: "section"
citation: "6 U.S.C. § 1139"
title: "6"
title_heading: "Domestic Security"
number: "1139"
heading: "Information sharing"
release: "119-102"
date: "2026-07-12"
url: "https://uscodex.org/usc/6/1139"
units:
  - "Chapter 4 — Transportation Security"
  - "Subchapter III — Public Transportation Security"
---

# §1139. Information sharing

- (a) **Intelligence sharing—** The [Secretary](/usc/6/1101.md?p=2) shall ensure that the [Department](/usc/6/1101.md?p=1) of Transportation receives appropriate and timely notification of all credible terrorist threats against public transportation [assets](/usc/6/101.md?p=3) in the [United States](/usc/6/1111.md?p=6).
- (b) **Information Sharing and Analysis Center—**
  - (1) **Authorization—** The [Secretary](/usc/6/1101.md?p=2) shall provide for the reasonable costs of the Information Sharing and Analysis [Center](/usc/6/681.md?p=1) for Public Transportation (referred to in this subsection as the “ISAC”).
  - (2) **Participation—** The [Secretary](/usc/6/1101.md?p=2)—
    - (A) shall require [public transportation agencies](/usc/6/1131.md?p=5) that the [Secretary](/usc/6/1101.md?p=2) determines to be at high risk of terrorist attack to participate in the ISAC;
    - (B) shall encourage all other [public transportation agencies](/usc/6/1131.md?p=5) to participate in the ISAC;
    - (C) shall encourage the participation of nonprofit employee labor organizations representing public transportation employees, as appropriate; and
    - (D) shall not charge a fee for participating in the ISAC.
- (c) **Report—** The Comptroller General shall report, not less than 3 years after August 3, 2007, to the [appropriate congressional committees](/usc/6/1111.md?p=1), as to the value and efficacy of the ISAC along with any other public transportation information-sharing programs ongoing at the [Department](/usc/6/1101.md?p=1). The report shall include an analysis of the user satisfaction of [public transportation agencies](/usc/6/1131.md?p=5) on the [state](/usc/6/1111.md?p=4) of information-sharing and the value that each system provides the user, the costs and benefits of all [centers](/usc/6/681.md?p=1) and programs, the coordination among [centers](/usc/6/681.md?p=1) and programs, how each [center](/usc/6/681.md?p=1) or program contributes to implementing the information sharing plan under section 1203,[^1] and analysis of the extent to which the ISAC is duplicative with the [Department](/usc/6/1101.md?p=1)’s information-sharing program.
- (d) **Authorization—**
  - (1) **In general—** There are authorized to be appropriated to the [Secretary](/usc/6/1101.md?p=2) to carry out this section—
    - (A) $600,000 for fiscal year 2008;
    - (B) $600,000 for fiscal year 2009;
    - (C) $600,000 for fiscal year 2010; and
    - (D) such sums as may be necessary for 2011, provided the report required in [subsection (c)](#c) of this section has been submitted to Congress.
  - (2) **Availability of funds—** Such sums shall remain available until expended.

## Footnotes

[^1]: See References in Text note below.

## Source credit

(Pub. L. 110–53, title XIV, § 1410, Aug. 3, 2007, 121 Stat. 412.)

## Notes

### Editorial Notes

### References in Text

Section 1203, referred to in subsec. (c), is section 1203 of title XII of Pub. L. 110–53, Aug. 3, 2007, 121 Stat. 383, which amended section 114 of Title 49, Transportation, and enacted provisions set out as a note under section 114 of Title 49.