SB508

Generally revise driving under the influence laws for THC levels in drivers under 21

Complete·5/5/25

Montana SB508 revises driving under the influence laws for drivers under 21, establishing any level of THC as DUI.

Montana SB508 amends the state's driving under the influence laws to include any detectable level of tetrahydrocannabinol (THC) as grounds for DUI for drivers under 21. The bill modifies the definition of driving under the influence to include any amount of THC in the blood or other bodily substance of drivers under 21. This change aligns the legal standards for THC with those for alcohol, where any level of alcohol concentration is considered DUI for young drivers.

Included in complete analysis

  • Overview
  • Core Provisions
  • Implementation
  • Impact
  • Legal Framework
  • Critical Issues

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Sponsors

D
1
0
Democratic CaucusRepublican Caucus

Roll Call Votes

62 Yea

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37 Nay

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1 Absent

R

Calendar

Apr 9, 2025

8:00 AM

House Judiciary Hearing

Mar 3, 2025

3:00 PM

Senate Highways and Transportation Hearing

History

May 8, 2025

Senate

Chapter Number Assigned

May 5, 2025

Senate

(S) Signed by Governor

Apr 25, 2025

House

(H) Signed by Speaker