I get that they're trying to prevent abuse / grief (last minute join into union, leader kicking people last minute, etc), but something like this should really have been communicated way before the start of event, not 21 hours before it. With the 24 hour join limit, even if you saw the message and left immediately, you would've still been screwed either way (assuming completely inactive union). And honestly, I kind of fail to see what purpose a 24 hour limit would serve to any party, be it players or Nutaku.