I have received my landing visa from the canadian embassy in brazil and will be arriving in canada in a week. I want to travel back to Brazil a week later ( ie a week within my arriving in Canada) for personal reasons. I will obviously not have my PR card by then. I have heard it takes 4-6 weeks to get it. Can I get special permission before I leave Canada, to be able to re-enter, or will that permission (is it called a travel document?) be granted only by the Canadian embassy in Brazil?