As time goes by, some decisions don't wear well. Some minor matters have never been wholeheartedly accepted by one or another of the participants. Other decisions have developed unforeseen problems, and sometimes the weekly meeting didn't agree to reconsider these. So there builds up a backlog of minor appeals, open issues, or disgruntlements. To settle these we held annual supreme court sessions, lasting typically two weeks. (I would hold them every six months if I were doing it again.)
