Originally Posted by
skybluesea
And unlike alcohol, THC metabolites can linger for weeks or longer, so what test will confirm NOT just presence but impairment as well - so GoC has in recent weeks just introduced new regs but they remain untested, and activists fully intend to challenge these regs on Oct 17th, the moment they come into force.
THC metabolites linger for about a month in blood tests, which is why many organizations (including police for roadside tests) are moving in the direction of saliva tests where the metabolites are recognized sooner and also dissipate within hours rather than weeks.
Having said that, AC
may be in a sufficiently safety-sensitive field that they are able to argue successfully for zero tolerance - even if the substance is legal. It will be interesting to watch the direction taken by the courts.