German president Frank-Walter Steinmeier signed off on legislation a fortnight ago to set a limit for driving under the influence of cannabis, with the new legal limit that's now taken effect being 3.5 nanograms of THC per millilitre of blood.
THC or tetrahydrocannabinol is the psychoactive ingredient of cannabis, which produces a high or euphoric feeling in the consumer of the plant. And as cannabis reacts differently to the body than alcohol does, the process of setting THC intoxication level limits is not as straightforward as booze.