After the second failure, it's 6 months. While the vote is running, you can ask ausadmin to cancel the vote. If a vote is cancelled, the waiting period mentioned in the previous paragraph may apply. Creating a newsgroup successfully requires the newsgroup to be created on a majority of news servers which participate in the aus. Ausadmin sends a special control message which requests all servers to create the group.
Automation can only work if the news administrator trusts some party to act responsibly.
Ausadmin uses a system called PGPverify to digitally sign control messages sent by it. News administrators can, and should, set their systems to trust only control messages posted by ausadmin for activities which affect aus. Some newsgroups go on to greatness. Others languish in mediocrity. A few fade away.