The Criminal Code provides strict requirements for roadside screening device and Breathalyzer demands. (mcgarrylaw.ca)
The saliva samples were analyzed using two roadside screening devices, the Draeger DrugTest 5000 (DT5000) and Alere DDS2 (DDS2); these devices use THC cutoff points of 5 µg / L and 25 µg / L, respectively, to determine if someone is positive or negative for marijuana use. (sciencedaily.com)
In this case, the appellant had failed a roadside screening device test after being stopped by police; he provided samples of his breath at the police station, which registered readings significantly over the legal limit, and was charged with driving «over 80,» contrary to s. 253 of the Criminal Code. (canadianlawyermag.com)