So, just to be completely, totally clear... Schools that are members of The Council of Graduate Schools aren't supposed to make you respond before Apr 15, right? Even if it's a Canadian school (but still a member of said Council), and for a master's program not a PhD?
The reason I ask is because I was accepted to a Canadian school (and CGS member) as a masters student, but the letter "requested" a response by March 22 (a mere three weeks from when I received the letter). I like the school a lot and I feel there is a good probability I will end up going there, but I would prefer to have time to visit before making a final decision and I am still waiting to hear from a couple of schools which, depending on a number of factors, might win out over this school for where I want to go. Basically, I would prefer to have a chance to visit and hear from certain other schools before having to decide without risking losing my spot or my funding.
Obviously I need to call/email and ask them if I can have more time, but I'd like to know going in to the call what the rules are that they're supposed to follow. Makes it a bit easier to push for more time if I can (gently/politely) give the impression that I am aware of the rules.