I must say that I regard this as complex proposed legislation. I hope I've interpreted it properly.
There's no doubt that a person can be impaired by drugs or alcohol. There's no doubt, as I understand it, that different amounts will have different effects on people.
My remarks were really directed to the defences that are available to a person in a courtroom. If a person is charged with an offence that relates to drug or alcohol consumption, the person should have the opportunity to deny drug or alcohol consumption and to have that counted as relevant in the court proceedings. If there are provisions that provide a certain weight or reliability to the drug or alcohol testing mechanisms and the way they can prove consumption in court, there needs to be a way to effectively rebut that.