Their position surprised me. This is why I will pursue this further. I didn't do so, because I thought that my memory served me well, but this issue does need to be clarified. As a matter of fact, I clearly remember a discussion I had with the attorney general of one province in particular who objected to inmate voting. I had had to tell him that referenda were federal, that federal law applied and that the inmates in his province were going to vote. I won't tell you which province it was, however.
On October 26th, 2010. See this statement in context.