# Missouri HB1803: Requires the Air Conservation Commission to suspend by January 1, 2028, any motor vehicle emissions inspection program established under the Air Quality Attainment Act

Missouri HB1803, Requires the Air Conservation Commission to suspend by January 1, 2028, any motor vehicle emissions inspection program established under the Air Quality Attainment Act, is a 2026 Regular Session House bill sponsored by Mark Matthiesen (Republican); status failed, last action 2026-02-12 (Referred: Government Efficiency) (as of 2026-11-04).

- Canonical: https://policyrisk.com/state-bill/MO-HB1803-2026
- As of: 2026-11-04
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Bill: Missouri HB1803
- State: Missouri
- Session: 2026 Regular Session
- Title: Requires the Air Conservation Commission to suspend by January 1, 2028, any motor vehicle emissions inspection program established under the Air Quality Attainment Act
- Status: failed
- Chamber: House
- Introduced: 2025-12-01
- Last action: 2026-02-12, Referred: Government Efficiency
- Sponsor: Mark Matthiesen (Republican)
- Cosponsors: 4
- Touches household money: no
- Economic provisions PRIA read: 0

## Summary

No summary available.

## Bill overview

No economic impacts identified for this bill.

## Sponsors and cosponsors

- Sponsor: Mark Matthiesen (Republican), House
- Cosponsor: Brad Christ (Republican), House
- Cosponsor: Brian Seitz (Republican), House
- Cosponsor: Chad Perkins (Republican), House
- Cosponsor: Richard West (Republican), House

## Actions (4)

- 2026-02-12: Referred: Government Efficiency (House)
- 2026-01-08: Read Second Time (House)
- 2026-01-07: Read First Time (House)
- 2025-12-01: Prefiled (House)

## Bill text

- Introduced, 2026-01-07: [PDF](https://documents.house.mo.gov/billtracking/bills261/hlrbillspdf/4145H.01I.pdf)

## Related bills

- SB1408: Increases the maximum speed limit from 70 to 75 miles per hour on rural interstates and freeways (signed)
- SB1135: Creates "Bentley and Mason's Law" relating to child maintenance orders for certain persons convicted of the offense of driving while intoxicated (signed)
- SB1067: Establishes the Uniform Public Expression Protection Act, which provides procedures for dismissal of actions based on public expression (signed)
- SB1019: Modifies several provisions relating to health care (signed)
- SB973: Creates and modifies provisions relating to real estate transactions (signed)
- SB890: Repeals expired, terminated, sunset, and obsolete sections of law (signed)

## Sources
- [Introduced (PDF)](https://documents.house.mo.gov/billtracking/bills261/hlrbillspdf/4145H.01I.pdf)

## Related
- [SB1408: Increases the maximum speed limit from 70 to 75 miles per hour on rural interst…](https://policyrisk.com/state-bill/MO-SB1408-2026)
- [SB1135: Creates "Bentley and Mason's Law" relating to child maintenance orders for cert…](https://policyrisk.com/state-bill/MO-SB1135-2026)
- [SB1067: Establishes the Uniform Public Expression Protection Act, which provides proced…](https://policyrisk.com/state-bill/MO-SB1067-2026)
- [SB1019: Modifies several provisions relating to health care](https://policyrisk.com/state-bill/MO-SB1019-2026)
- [SB973: Creates and modifies provisions relating to real estate transactions](https://policyrisk.com/state-bill/MO-SB973-2026)
- [SB890: Repeals expired, terminated, sunset, and obsolete sections of law](https://policyrisk.com/state-bill/MO-SB890-2026)
- [Missouri bills](https://policyrisk.com/states/missouri/bills)
- [Missouri state hub](https://policyrisk.com/states/missouri)
- [All state legislation](https://policyrisk.com/state-bills)

Source: PRIA, https://policyrisk.com/state-bill/MO-HB1803-2026 (as of 2026-11-04).