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HB 1804MISSOURISession 2026State Billin committee

High Impact

Missouri House Bill 1804 modifies ignition interlock device requirements for intoxication-related traffic offenses

Original title: IGNITION INTERLOCK DEVICE REQUIREMENTS

Last action · May 15, 2026: Referred: Emerging Issues(H)Sponsor: Mark Sharp

Bill progressHistory & official text ↓

Introduced

Committee

Floor Vote

Passed

Law

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What This Bill Would Do

Representative Mark Sharp introduced HB 1804 to modify statutory provisions relating to requirements for certain intoxication-related traffic offenses, license reinstatements, and chemical test refusals.

Why it matters

Drivers convicted of specific alcohol-related traffic offenses or chemical test refusals face updated mandates regarding certified installation, maintenance timelines, and misdemeanor penalties for noncompliance.

Who It Would Affect

Groups the bill's text would affect if enacted, as described in the record. Being affected is not a position for or against it.

Directly affected

Drivers with intoxication-related traffic offenses

Drivers must install certified ignition interlock devices and meet maintenance conditions to reinstate driving privileges.

Directly affected

Substance abuse traffic offender program administrators

Administrators must remit supplemental fees and interest to the department of mental health under penalty of law.

Key Facts

You don't have to trust us. Each fact below is taken straight from the official document - click any one to see the exact passage, highlighted in the original.

Frequently Asked Questions

Who is required to install an ignition interlock device under this bill?

Drivers convicted of certain intoxication-related traffic offenses, those with specific blood alcohol concentration thresholds, repeat offenders, and individuals refusing chemical tests must install certified s.

What happens if a driver fails to maintain proof of an ignition interlock device?

Failing to maintain proof of the device with the director of revenue results in license resuspension or revocation and is classified as a class A misdemeanor.

What else do you want to know?

News Coverage

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Where This Stands

Currently in committee. The next step in the legislative lifecycle is Floor Vote.

Procedural history

4 actions

May 15, 2026HouseCommittee
Referred: Emerging Issues(H)
Jan 8, 2026HouseFloor
Read Second Time (H)
Jan 7, 2026HouseIntroduced
Read First Time (H)
Dec 1, 2025HouseIntroduced
Prefiled (H)

Version history

Only one version on file - nothing to compare yet. As later stages (committee substitute, engrossed, enrolled) are captured, the redline appears here.

View official text →

Lobbying Activity

No state lobbying filings in our records match this bill. Federal lobbying reports (LDA) cover Congress, so they are not listed on state bills.

Full breakdown

Who this bill affects and the strongest case for and against it, written only from the bill’s own text.

Connected Entities

Department of Mental Health, Joseph Engler, Department of Revenue and 2 more

OrganizationDepartment of Mental Health“State department overseeing substance abuse traffic offender programs”Map →

PersonJoseph Engler“Chief Clerk”Map →

OrganizationDepartment of Revenue“State department handling driver licensing and financial responsibility”Map →

PersonMark Sharp“Representative introducing HB 1804”Map →

OrganizationDepartment of Transportation“State department establishing alcohol setpoints for ignition interlock devices”Map →

Sources

Open source document

house.mo.gov

Analysis Score

0–100

Significance75
How much this matters to a regular citizen
Controversy40
Intensity of disagreement among stakeholders
Entertainment5
Compellingness for a non-policy-wonk reader
Buzz20
Current news / social attention level

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