Contraband drugs are a problem, but so is the diversion of legal drugs. Your specific question was, is the CSC administering illegal drugs? My answer was straightforward: it was no. You have a drug subculture within prisons. It makes some sense, when you think about it: the majority of individuals who, at the time of their index offence, were under the influence of an intoxicant. You look at the life histories of most men and women in prisons and you'll see there are histories of substance abuse of one kind or another.
On December 1st, 2016. See this statement in context.