Kingdoms of Arnor
You make an administrative decision with regard to your domain or a declaration to other domains. There is no domain action check for a decree action. A decree cannot directly affect another regent's domain, change the level of a holding (this would be a Contest action), or change the attitude of the populace (this would be an Agitate action). Example decrees might including the raising of a vassal to a new noble rank or position, a declaration of support for some party or another in a conflict, the grant of permissions to a noble or military order, a declaration of war, an increase in taxes (if the variable taxation variant is in use), the declaration of a new holiday or public event, or any similar action.
Through the use of the Decree domain action a regent may increase their court level by +1 per season. Only one such decree can be made per domain turn. Likewise, a regent can decrease the size of their court by any amount. The new court level is permanent until changed through a future decree.