Alright, let me describe my problem:
I'm Roman Emperor and have absolute crown authority. I have given kingships so that I can centralize levy gathering on coastal provinces and so that I won't have to deal with dozens of vassals and their petty problems. However some of my kings began declaring holy wars all by themselves and I don't want that as it messes up both my borders and also results in some kings gaining more power than I want them to. I noticed that they are the kings that are outside of de jure borders of Roman Empire like Kingdom of Africa, Jerusalem and Egypt. Is there a solution to this?
I'm Roman Emperor and have absolute crown authority. I have given kingships so that I can centralize levy gathering on coastal provinces and so that I won't have to deal with dozens of vassals and their petty problems. However some of my kings began declaring holy wars all by themselves and I don't want that as it messes up both my borders and also results in some kings gaining more power than I want them to. I noticed that they are the kings that are outside of de jure borders of Roman Empire like Kingdom of Africa, Jerusalem and Egypt. Is there a solution to this?