A few questions regarding vassals:
1. Are they full domains able to take a full set of domain actions, as in 3 regent actions, 1 bonus class action, 1 lt action etc.?
2. If I want to change taxes across my realm, including vassal provinces, do I use 1 action and it is done, or do I have to request that each vassal change the tax in their provinces to what I want.
3. Do I have to pay an action, to order a vassal to perform an action on my behalf?
4. Is this written somewhere I just haven't found yet?