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Diesel Truck Liberation Act of 2025
To prohibit the enforcement of laws relating to the installation, certification, and maintenance of emissions control devices under the Clean Air Act, and for other purposes.
Summary
This bill prohibits the federal government from requiring the installation, certification, or maintenance of emissions control devices or onboard diagnostic systems on motor vehicles and motor vehicle engines. The bill eliminates the Environmental Protection Agency's authority to promulgate or enforce regulations requiring such devices under the Clean Air Act. The bill also provides that no person or entity can be held civilly or criminally liable for manufacturing, selling, using, or modifying vehicles without emissions control devices, and vacates existing criminal penalties and expunges records of prior convictions related to violations of emissions control device requirements.
AI-generated plain-language summary of the bill text — neutral, and may be imperfect. See the full text below for the exact wording.
Sponsor (1)
2 cosponsors
- Sen. Ricketts, Pete [R-NE] (R-NE)
- Sen. Sullivan, Dan [R-AK] (R-AK)
Actions (2)
- Oct 14, 2025 Read twice and referred to the Committee on Environment and Public Works. · senate
- Oct 14, 2025 Introduced in Senate
Similar bills (6)
Bills with similar text or summary — includes reintroductions across Congresses. Ranked by semantic similarity of the bill text (computed locally); a neutral discovery aid, not a claim the bills are duplicates.
Full text
IN THE SENATE OF THE UNITED STATES
October 14, 2025
Ms. Lummis introduced the following bill; which was read twice and referred to the Committee on Environment and Public Works
A BILL
To prohibit the enforcement of laws relating to the installation, certification, and maintenance of emissions control devices under the Clean Air Act, and for other purposes.
Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled,
SECTION 1. SHORT TITLE.
This Act may be cited as the “Diesel Truck Liberation Act of 2025”.
SEC. 2. PROHIBITION ON ENFORCEMENT OF EMISSIONS CONTROL DEVICE LAWS.
(a) In General.—Notwithstanding any other provision of law, including title II of the Clean Air Act (42 U.S.C. 7521 et seq.), no Federal law (including regulations and Executive orders) may require a manufacturer, importer, or distributor of motor vehicles or motor vehicle engines to install, certify, or maintain any emissions control device or onboard diagnostic system on any motor vehicle or motor vehicle engine.
(b) No Authority.—The Administrator of the Environmental Protection Agency may not promulgate or enforce any requirement under the Clean Air Act (42 U.S.C. 7401 et seq.) (including a regulation promulgated under that Act) or any other Federal law (including regulations) that requires the installation or maintenance of emissions control devices or onboard diagnostic systems on motor vehicles or motor vehicle engines.
(c) No Liability.—Notwithstanding any other provision of law, no person or entity shall be subject to civil or criminal liability under any Federal law (including regulations) for the manufacture, sale, importation, purchase, use, or modification of a motor vehicle or motor vehicle engine that does not contain an emissions control device or onboard diagnostic system.
(d) Repeal of Regulations.—Any regulation promulgated under the Clean Air Act (42 U.S.C. 7401 et seq.) or any other Federal law related to the installation, modification, or removal of emissions control devices or onboard diagnostic systems on motor vehicles or motor vehicle engines shall have no force or effect.
(e) Vacatur; Expungement.—With respect to any of the conduct described in this section for which criminal or civil liability has attached—
(1) any criminal penalty of imprisonment shall be vacated; and
(2) any record of a finding with respect to that criminal or civil liability shall be expunged. <all>
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