You are practically in. It is very unusual for a graduate school to turn you down after you have been recommended for admission by a department.
However, you should let them know you have other acceptances and their deadlines, just so that the notification of acceptance does not come after them. Also, offers of financial aid usually only come after being officially accepted by the graduate school.
My experience is more US than Canada, but I suppose it applies to your case.
EDIT: re-reading, I remembered you said this is your top choice. Congratulations! You're in. Funding may still be a concern, though, so you may want to remind them you have other offers so they don't delay too much.