DUI with Excessive Marijuana Concentration

Another form of "per se" DUI in Montana prohibit operate a vehicle with excessive marijuana concentration under § 61-8-411, MCA. The statute prohibits driving under the following conditions:

  • with blood levels of 5 ng/ml of Delta-9-Tetrahydrocannabinol or more, a driver is presumed to be too impaired to drive safely (effective October 1, 2013); or
  • with sufficient evidence of impairment, a person can be convicted of DUI with a THC level below 5 ng/ml.

The prohibition on driving with an excessive marijuana concentration applies to all commercial and non-commercial drivers, including individuals registered as cardholders with Montana’s Marijuana Program. Read more about 

Read more about penalties and punishments for marijuana crimes in Montana, including possession of marijuana.

Attorney for Driving Under the Influence of Marijuana in Montana

If you were charged with driving under the influence (DUI) of marijuana in Montana then contact an experienced DUI defense attorney at Beebe Law Firm. Greg Beebe represents clients charged with DUI cases involving marijuana in Helena in Lewis and LCark County and in Boulder in Jefferson County, Montana. He also represents clients throughout the surrounding areas in Montana. 

Call 1 (406) 442-3625 today to discuss your case today.


Beebe Law Firm - Criminal and DUI Defense
110 N Warren St Helena, MT 59601