Thanks for the link to that Apostolic Constitution, Slyfox. I was especially struck by the Pope's words as follows:
1. During the vacancy of the Apostolic See, the College of Cardinals has no power or jurisdiction in matters which pertain to the Supreme Pontiff during his lifetime or in the exercise of his office, such matters are to be reserved completely and exclusively to the future Pope. I therefore declare null and void any act of power or jurisdiction pertaining to the Roman Pontiff during his lifetime or in the exercise of his office which the College of Cardinals might see fit to exercise, beyond the limits expressly permitted in this Constitution.