I see a lot of people saying that they NEED an AIP or else they won't be able to register for their courses or that the university will cancel their admission if they don't get AIP within the next few days. What does this mean and do all universities need it? My university, the University of Waterloo hasn't informed me regarding any such condition/restriction. Also, is it easier to get a visa for postgrad courses, such as a Masters or PhD, or undergraduate, Bachelors courses ..... does that have an impact on the chances you have for approval/rejection?