Missouri HB3515: Prohibits taxpayer resources from being used to enforce federal laws governing emissions control equipment on diesel engines

What the bill says

To amend chapter 1, RSMo, by adding thereto one new section relating to diesel-powered vehicles, with penalty provisions. Section A. Chapter 1, RSMo, is amended by adding thereto one new section, to be known as.

From the introduced text:

To amend chapter 1, RSMo, by adding thereto one new section relating to diesel-powered vehicles, with penalty provisions. Section A. Chapter 1, RSMo, is amended by adding thereto one new section, to be known as section 1.371, to read as follows: 1.371. 1. As used in this section, the term "diesel-powered vehicle" means any of the following, as defined in section 301.010, that is powered by a diesel-fueled (2) Boat transporter; (3) Bus; (4) Commercial motor vehicle; (5) Farm tractor; (6) Fleet vehicle; (7) Local commercial motor vehicle; (8) Local log truck; (9) Local log truck tractor; (10) Local transit bus; (11) Log truck; (12) Non-USA-std motor vehicle; (13) Recreational motor vehicle; (14) School bus; (15) Shuttle bus; EXPLANATION -- Matter enclosed in bold-faced brackets [thus] in the above bill is not enacted and is intended to be omitted from the law. Matter in bold-face type in the above bill is proposed language. HB 3515 (16) Tractor, truck tractor, or truck-tractor; (17) Truck; (18) Truck-tractor semitrailer-semitrailer; (19) Truck-trailer boat transporter combination; or (20) Wrecker or tow truck. 2. No entity or person, including any public officer or employee of this state or any political subdivision of this state, shall have the authority to enforce or attempt to enforce any federal acts, laws, executive orders, administrative orders, court orders, rules, regulations, …

Read the full official text

Sponsors

• Scott Cupps (R, 158) · primary sponsor

Latest actions

1. May 15, 2026: Referred: Emerging Issues(H)
2. March 2, 2026: Read Second Time (H)
3. February 27, 2026: Introduced and Read First Time (H)

Common questions

What is HB3515?

HB3515 is a bill in the Missouri Legislature (2026 Regular Session): Prohibits taxpayer resources from being used to enforce federal laws governing emissions control equipment on diesel engines.

What does HB3515 do?

In its own words: To amend chapter 1, RSMo, by adding thereto one new section relating to diesel-powered vehicles, with penalty provisions. Section A. Chapter 1, RSMo, is amended by adding thereto one new section, to be known as.

What is the status of HB3515?

In committee as of May 15, 2026. Latest action: Referred: Emerging Issues(H) (May 15, 2026).

Who sponsored HB3515?

Scott Cupps (R, 158).

Where is the official record for HB3515?

On the Missouri Legislature website: https://house.mo.gov/BillContent.aspx?bill=HB3515&year=2026&code=R