Give Councilors access to the Hall of the Council. Make a quick transition to the second floor and back next to the entrance of the House for Councilors to use. Maybe a official decrees sending system to only be used for official Council business. e.g. announcing bounties and trials, declaring new laws, calling meetings and forums.
Currently wearing a Ring of Final Sanctuary means you can't enter from an outside transition. Could this maybe be fixed so Councilors aren't accidentally forgetting to take them off and getting blocked from entering?