Some of the hard evidence that you talk about comes through in some of the other criteria that are required. The word “opinion” was chosen because the people from whom it's requested are in positions to well understand the local conditions that would either require or not require, in their opinion, a supervised injection site and the impacts on the community and the crime rates, etc., in the current situation. It was really to learn from people in positions of authority who would have the knowledge whether they accepted the idea, rejected the idea, or neither.
On October 27th, 2014. See this statement in context.