As prevention, this potentially could be brought down. I do agree that the interlock system should be introduced as soon as possible. Whereas in Quebec they can do it after three months, at one point in Ontario they had to wait a year, and then it was a year with the interlock. By this point they have learned that they can get away with driving under suspension, and they wait a second year before they finally get their licence, so they stay out of the system.
It should be mandatory that it be introduced early on, and it should be performance based, i.e., if you are still showing signs of impairment, the vehicle doesn't start, and if you're in your twelfth month, it shouldn't stop come the end of the month; it should continue.