If held for 100 years a kingdom can de jure drift out into a new empireSo duchies may drift if they border another de jure held kingdom? But kingdoms may not?
It must be fully controlled to driftBut not if a vassal kingdom is held by a vassal for a 100 years, then it won't drift, Bravoos didn't drift into the north, after being held by a vassal of mine for a 100 years? Is it if I hold the kingdom title?
Should do indeedSo if a vassal of mine controls all de jure provinces within the kingdom, and I am his non-de jure overlord, will it drift then?