this is a difficult one if there were a clear example then no doubt the arbcom would have given one despite there being many arbitrators who could have proposed ideas no doubt they were mindful that no suggestion made by the community to date had come close to reaching consensus i'm also mindful that a proposal to leave date notation questions to the talk pages of individual articles also failed to gain community consensus largely as there was no appetite to repeat the same arguments over a large number of articles i think a substantial reason for the change would be if it was consistent with a proposal discussed community wide that gained consensus however i don't see any proposal gaining this consensus at present another reason would be if it were a change that was so obvious that no one would rationally oppose it again i can't think of a real life example here