I wouldn't have anything to add other than the fact that impaired driving provisions in the Criminal Code today and historically have been among the most litigated parts of the Criminal Code. When there is a reform in this area, be it small or significant, as private member's Bill C-226 proposes, it's reasonable to expect that there will be charter challenges. That does not mean that provisions would necessarily fail because of the charter challenges, but it is a reality.
On September 27th, 2016. See this statement in context.