Montana legislation · 2025 Regular Session
Montana SB508: Generally revise driving under the influence laws for THC levels in drivers under 21
Status: Signed into law, May 8, 2025
What the bill says
An act providing that any level of tetrahydrocannabinol constitutes driving under the influence for drivers under 21 years of age; and amending section 61-8-1002, mca.
From the engrossed text:
AN ACT PROVIDING THAT ANY LEVEL OF TETRAHYDROCANNABINOL CONSTITUTES DRIVING UNDER THE INFLUENCE FOR DRIVERS UNDER 21 YEARS OF AGE; AND AMENDING SECTION 61-8-1002, MCA. Section 1. Section 61-8-1002, MCA, is amended to read: "61-8-1002. Driving under influence. (1) A person commits the offense of driving under the influence if the person drives or is in actual physical control of: (a) a vehicle or a commercial motor vehicle upon the ways of this state open to the public while under the influence of alcohol, any drug, or a combination of alcohol and any drug; (b) a noncommercial vehicle upon the ways of this state open to the public while the person's alcohol concentration, as shown by analysis of the person's blood, breath, or other bodily substance, is 0.08 or more; (c) a commercial motor vehicle within this state while the person's alcohol concentration, as shown by analysis of the person's blood, breath, or other bodily substance, is 0.04 or more; (d) a noncommercial vehicle or commercial motor vehicle within this state while the person's tetrahydrocannabinol level, excluding inactive metabolites, as shown by analysis of the person's blood or other bodily substance, is 5 ng/ml or more; or (e) (i) a vehicle within this state when the person is under 21 years of age at the time of the offense while …
Sponsors
- Curdy, Willis (D, 49) · primary sponsor
- Kelly, Steven (R, 9)
Latest actions
- : Chapter Number Assigned
- : (S) Signed by Governor
- : (S) Transmitted to Governor
- : (H) Signed by Speaker
- : (S) Signed by President
- : (S) Returned from Enrolling
- : (S) Sent to Enrolling
- : (H) 3rd Reading
- : (H) Scheduled for 3rd Reading
- : (H) 2nd Reading
Votes
- Do Concur (April 11, 2025): 61 yea, 38 nay, passed
- Do Concur (April 11, 2025): 62 yea, 37 nay, passed
- Do Pass (March 6, 2025): 44 yea, 6 nay, passed
- Do Pass (March 6, 2025): 42 yea, 7 nay, passed
Subjects: Law Enforcement, Alcohol, Motor Vehicles
Common questions
- What is SB508?
- SB508 is a bill in the Montana Legislature (2025 Regular Session): Generally revise driving under the influence laws for THC levels in drivers under 21.
- What does SB508 do?
- In its own words: An act providing that any level of tetrahydrocannabinol constitutes driving under the influence for drivers under 21 years of age; and amending section 61-8-1002, mca.
- What is the status of SB508?
- Signed into law as of May 8, 2025. Latest action: Chapter Number Assigned (May 8, 2025).
- Who sponsored SB508?
- Curdy, Willis (D, 49), with 1 co-sponsor.
- Where is the official record for SB508?
- On the Montana Legislature website: https://bills.legmt.gov/#/laws/bill/2/LC3514
Source: official Montana record. Tracked by Delilah, AI for legislation across all 50 states and Congress.