IIRC there's nothing useful in it. It says that if you're in Canada you can land either by crossing border or at CIC office, take all necessary documents with you (proof of funds, proof of valid status in Canada - work permit or study permit, etc, etc). If there's any change in your family you have to report it immediately. Visa validity can't be extended, thus you have to land before it expires.
Thank you anarsoul. So it is not required as a landing document. What is the best way to validate the confirmation of PR from time saving perspective, crossing border or at CIC office? can i have your advice?