Mr. Speaker, what I am saying is that the experts do not agree when it comes to serum level limits. It is extremely difficult to prove that a specific dose will cause a person to be impaired.
In other scientific tests, in the case of cognitive tests, for example, if you ask a person to perform a task that he or she cannot do, you can prove scientifically that the person is not fit to drive. It might be simpler for the government and the police to use these types of tests to prove that a person is unable to drive, because there would be a direct link between the task and the person’s ability to drive. Let us say that a person is required to have certain reflexes. If we test the person’s reflexes and determine that they are too slow, we are making a direct link between substance use and reflexes that are slow enough to raise questions about the person’s ability to drive. It is also much easier to prove in court than obtaining a blood test.
Also, you may have to wait an hour or two before you can do a blood test in some rural regions. As an emergency nurse, I am resuscitating someone, so my priority is not to do a blood test to determine a patient’s serum THC level. My priority is to save a life.
When we administer a standardized test, we do it right away and we get the proof we need. It is far more difficult to challenge, because we have a video of the person failing to perform physical tasks that show that he or she is unable to drive.