Germany: Cannabis and driving
The Federal Constitutional Court, the highest German court, declared unconstitutional the enforcement of a law, which defines motorists with any detectable level of THC in the blood as being under the influence of cannabis.
The court said that the prosecution of persons who test positive for trace levels of THC without being impaired, was not the legislative intent of the law. It noted that scientists usually do not assume the existence of an acute effect with blood concentrations below 1 ng/ml THC.
The judges decided on a case of a man who was driving while having a THC concentration below 0.5 ng/ml in his blood. He had admitted to have smoked cannabis 16 hours before the ride and as taken away his driving licence by the authorities.












