In recognition and partial acceptance of this trend, the World Anti-Doping Agency has raised the permitted level of one of cannabis’ active ingredient, THC, from previous threshold of 15 nanograms per millilitre to 150 nanograms per millilitre. Athletes are now allowed, in effect, to use the drug in training and even the night before a race, but not during the event itself, where its use would be regarded as violating the spirit of the sport.