"Pope Francis has asked cardinals resident in Rome to inform him when they leave the city, and the address of their stay....A letter from Cardinal Angelo Sodano, Dean of the College of Cardinals, reminds the prelates of the “noble tradition” of informing the Secretariat of State whenever they travel outside of Rome."
Why would he be doing this? One explanation is that the Cardinals need to be near Rome because of an impending consistory(due to a resignation). However, there are other explanations too. Time will tell.
It is true that Cardinals were (years ago) expected to let the Vatican Secretary of State their whereabouts; yet, this rule has not been enforced for years!