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ArkansasSB4782025 Regular SessionSenate

TO CREATE THE ARKANSAS DIESEL ENGINE FREEDOM ACT OF 2025; AND TO PROHIBIT STATE ENFORCEMENT OF FEDERAL REGULATION OF CERTAIN TYPES OF DIESEL ENGINES.

Sponsored By: Gary Stubblefield (Republican)

Enacted

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Bill Overview

Analyzed Economic Effects

4 provisions identified: 1 benefits, 3 costs, 0 mixed.

Public workers face firing and five-year bans

A state or local official, agent, worker, or representative who violates this law must be terminated from that government entity. The person also cannot hold public office or obtain state employment for five years.

Arkansas protects qualifying diesel engine use

Qualifying diesel engines run only in Arkansas and do not require diesel exhaust fluid. Arkansas law protects the right to make, sell, install, use, and operate these engines within the state. State and local agencies, officials, and workers cannot restrict their production, sale, or use. They also cannot enforce or attempt to enforce federal diesel rules that block these rights or require that fluid. This restriction on state enforcement does not make federal rules invalid generally.

Government violators face fines and enforcement suspensions

State entities that break this law face civil penalties of up to $5,000 for each violation. State entities include state agencies, local governments, and their officials, agents, workers, and representatives. A violating agency or local government immediately loses authority to enforce state vehicle-emissions laws or rules for at least 12 months.

Engine sellers face labels and export limits

An exempt diesel engine made and sold exclusively in Arkansas must clearly carry a label for Arkansas-only use. These engines operate only in Arkansas and do not require diesel exhaust fluid. Export for use in another state is barred unless the engine complies with applicable federal laws.

Sponsors & Cosponsors

Sponsor

  • Gary Stubblefield

    Republican • Senate

Cosponsors

There are no cosponsors for this bill.

Roll Call Votes

All Roll Calls

Yes: 121 • No: 3

House vote • 4/14/2025

House Vote - Monday, April 14, 2025 5:15:19 PM

Yes: 86 • No: 3 • Other: 6

Senate vote • 4/8/2025

Senate Vote - Tuesday, April 8, 2025 6:41:21 PM

Yes: 35 • No: 0

Actions Timeline

  1. Notification that SB478 is now Act 738

    4/18/2025Senate

  2. DELIVERED TO GOVERNOR.

    4/15/2025Senate

  3. Reported correctly enrolled and ordered delivered to the Governor.

    4/15/2025Senate

  4. ORDERED ENROLLED

    4/14/2025Senate

  5. Returned from the House as passed.

    4/14/2025Senate

  6. Returned to the Senate as passed.

    4/14/2025House

  7. Read the third time and passed and ordered transmitted to the Senate.

    4/14/2025House

  8. Returned by the Committee Do Pass

    4/9/2025House

  9. Read the first time, rules suspended, read the second time and referred to the Committee on PUBLIC TRANSPORTATION- HOUSE

    4/8/2025House

  10. RECEIVED FROM THE SENATE

    4/8/2025House

  11. Ordered immediately transmitted to the House.

    4/8/2025Senate

  12. Read the third time and passed.

    4/8/2025Senate

  13. Returned by the Committee, with the recommendation that it Do Pass

    4/7/2025Senate

  14. Read first time, rules suspended, read second time, referred to TRANSPORTATION, TECHNOLOGY & LEGISLATIVE AFFAIRS - SENATE

    3/17/2025Senate

  15. Filed

    3/17/2025Senate

Bill Text

  • SB478 - Introduced

    3/17/2025

    PDF

  • Act Version

    PDF

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