Canada’s proposed overhaul of federal impaired driving rules could unfairly criminalize medical cannabis users, according to an open letter to Ottawa signed by more than 50 criminal defence lawyers.
The letter, which warns that medical marijuana users could be unfairly punished under the proposed system, underscores the challenges to preventing high driving. Experts are divided on just how much THC – the principal psychoactive compound of cannabis – would make someone impaired, and the government is still developing a reliable way to conduct a roadside test.