The challenge is always, as my colleagues also pointed out, in reassuring Canadians that the activity in which the service engages is compliant with the Constitution and the rule of law. While I am personally satisfied that the service engages with the utmost professionalism when it comes to the use of its disruption powers, such a measure may be justified in some cases as a way to reassure Canadians about the expanded powers that CSIS has been given. Also, where there is controversy over whether these powers should reside with CSIS or with law enforcement—and I explained why I think, for better or for worse, for the time being they need to reside with CSIS—the warrant measures may be necessary to ensure the legitimacy and credibility of the activities in which CSIS engages.
On December 7th, 2017. See this statement in context.