Montana DUI Laws

Montana DUI Laws: Blood Alcohol Concentration (BAC) Limits and Implied Consent
"Per Se" BAC Limit	0.08 Percent
Zero Tolerance (Underage) BAC Limit	0.02 Percent
Enhanced Penalty (Aggravated) BAC Limit	None
Implied Consent to Submit to BAC Test?	Yes

Montana DUI Laws: Select Penalties
Minimum License Suspension or Revocation (1st, 2nd, 3rd offense)	6 months/ 1 year (reduction possible) / 1 year (reduction possible)
Mandatory Alcohol Education, Assessment and Treatment	Yes
Vehicle Confiscation Possible?	Yes
Ignition Interlock Device Possible?	Yes (mandatory for repeat offenders)

Montana DUI Statutes: Driving under the Influence (Mt. Code 61-8-401); DUI Penalties (Mt. Code 61-8-714); DUI Education and Treatment (Mt. Code 61-8-732); Ignition Interlocks (Mt. Code 61-8-442).
Driver License Sanctions - Breakdown of license suspension and revocation periods for varying offenses, including DUI offenses (Montana Attorney General's Office).
DUI Courts - Details on the DUI court system in Montana, aimed at breaking DUI cycles (Montana Dept. of Transportation).

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