Montana
Select Law
State Laws
- Felony DUI
- DUID Zero Tolerance and Per Se Laws
- Cannabis Drug-Impaired Driving Laws
- DUI Child Endangerment Laws
- Enhanced Penalties for High-BAC
- DUI Look-back Periods
- Open Container - Alcohol
- Good Samaritan
- Test Refusal
- 24/7 Programs
- Administrative License Suspension/Revocation
- Sobriety Checkpoints
- Habitual Offender Designation
- Drug Evaluation and Classification Program
- DUI Courts - Standalone
- DUI Courts - Hybrid
- Open Container - Cannabis
- Cannabis Laws (2023)
- DUID: Implied Consent Testing Methods
- DUID Affirmative Defense
- Anti-Plea Bargaining Statutes
- eWarrant Case Study Sites
- Preliminary Breath Test (PBT) Laws
- Lower BAC legislation
- Low BAC
- CARS Implementation
- Ignition Interlocks
- Electronic Warrants (E-warrants) Authorization
- Top Detected Drug Category by State (2021)
- False Identification - Sanctions
- False Identification - Point-of-Sale Policies
- No Refusal Programs
- Oral Fluid Testing
Administrative License Suspension/Revocation
ALS/ALR law enacted
Test Refusal
Administrative penalties
See the National Traffic Law Center's compilation of state implied consent laws and test refusal penalties to learn more.
DUI Child Endangerment Laws
These states have laws or statutes that address DUI child endangerment in which the offender is subject to a harsher penalty due to the presence of a child passenger.
See the National Traffic Law Center’s compilation of child endangerment statutes and penalties in DUI cases to learn more.
DUI Look-back Periods
Ten years
Enhanced Penalties for High-BAC
0.16
Felony DUI
Fourth offense
Open Container - Alcohol
In compliance with Federal requirements
Sobriety Checkpoints
Alternative to checkpoints
No Refusal Programs
Lacks authorization
Cannabis Laws
Recreational & Medical Cannabis
Ignition Interlocks
Mandatory repeat offender
Open Container - Cannabis
Cannabis-specific open container law
DUI Statute
DUI Alcohol and Other Drugs
Statute with THC listed as Delta 6, 7, 8, 9, 10, 11
9
DUID: Implied Consent Testing Methods
Blood, Oral Fluids
ALR Laws
Hardship license available for alcohol and other drugs
Social Host Laws
Alcohol
Roadside Preliminary Breath Test (PBT) Laws
Statute permits roadside PBTs