svalvasori

What are the actual laws in Ontario regarding how far your tire extends past your fender (or doesn't). I'd like to put 35 x 12.5 Duratrack's on, but I'm wondering how far out (and with what backspacing) a 12.5" tire sticks out? Can you just put a mud flap on it and be legal or is it the top of the fender?
I'd rather not get pulled over, or worry about getting pulled over.