Section 1. Short title
This Act may be cited as the Blocking Lawless Open Border Cities and States Act of 2025 or the BLOC Act.
(a) In general
Chapter 6 of title 23, United States Code, is amended by adding at the end the following:
(a) In general
The Secretary of Transportation shall not obligate or award funds for any infrastructure project, including for highway construction, to a political subdivision of a State, nor shall any funds obligated or awarded to a State, go to any political subdivision of a State that does not have in effect not later than 1 year after the date of enactment of the BLOC Act a statute, ordinance, policy, or practice requiring an entity or official of such political subdivision to notify the Secretary of Homeland Security (or designee thereof) not later than 48 hours before of the release from custody or detainment of an alien if—
(1) the Secretary of Homeland Security (or designee thereof) has determined that such alien is not lawfully present in the United States;
(2) not later than 48 hours before such release, the Secretary of Homeland Security (or designee thereof) has notified the sheriff or detaining entity of such State or political subdivision of the legal status of such alien; and
(3) such alien has been in custody or detainment for not less than 48 hours before such release.
(b) Definition of infrastructure project
In this section, the term infrastructure project has the meaning given such term in section 184.3 of title 2, Code of Federal Regulations (as in effect on the date of enactment of the BLOC Act).
(b) Clerical amendment
The analysis for chapter 6 of title 23, United States Code, is amended by adding at the end the following: