Ok so we've scoured the web in an attempt to find an explanation of whats going on with the new drug driving laws, specifically the laws sounding cannabis and driving due to laws implementing new tests for drug-drivers on the roadside. Many people are worried that they will be persecuted if they consume cannabis and then drive later on in the day, even if they are not impaired anymore.
Unfortunately it seems that these claims have some basis, and under the new law a zero tolerance approach is adopted, giving police the power to arrest drivers and take them to police stations for blood tests. Whether this will be rigorously enforced at this stage cannot be seen, but time will tell. For now, stay safe, and don't smoke and drive!