At a minimum, it is against the law for a driver below the age of 21 to operate a vehicle if they have a THC level that is above ____ per milliliter of blood.

It is illegal for a driver who is age 21 or older to operate a vehicle with a minimum THC level of five nanograms per milliliter of blood. A driver who is under the age of 21 may not operate a vehicle with any detectable amount of THC in their blood. The use of marijuana while driving can be extremely dangerous.