When team appointments of Chairs are done as part of a new Charter, AC Reps can Formally Object as part of the Charter review. In case of a Charter Extension, which may at the same time change the Chair, AC Reps can initiate an Advisory Committee Appeal. That seems enough to provide an opportunity for oversight, but there’s currently no way to Object to a change of Chair at other times. Maybe we should allow Formal Objections to Chair changes, or some other process, such as ratification by the AB.