The accused, Brady Robertson, brought a constitutional challenge against sections 320.14(1)(c) and 320.14(3) of the Criminal Code and section 2 of SOR/2018-148, which establish a per se limit of 5 ng/ml of THC in blood for drivers.
The challenge argued that the per se limit violated section 7 of the Charter by being arbitrary and overbroad, particularly for frequent and chronic cannabis users who might have residual THC levels above the limit without being impaired.
The Crown argued the legislation was a precautionary measure to deter impaired driving.
The court dismissed the application, finding that the legislation's objective was to strengthen impaired driving laws and deter cannabis users from driving when they pose a risk.
The court concluded that the 5 ng/ml per se limit was neither arbitrary nor overbroad, as it was rationally connected to the legislative objectives and did not criminalize harmless conduct in a manner inconsistent with fundamental justice principles.