What are the main differences between regulations of the NFL and the CFL?
I live in Canada and follow the NFL, but also watch CFL games once in a while. I know a few differences; for example in the NFL each team gets 4 tries to carry the ball 10 yards, but that is only 3 tries in the CFL. Also I have noticed that the field is bigger under CFL regulations.
I'm wondering what are the major differences between the rules in these two leagues, specially when it comes to fouls.