It’s not really covered by the rules since it’s less important than in-game. Generally, it’s
Which would either mean:
- You can only register once
- You can only have one account in use
It’s preferable that people recover old accounts and I’ve added nicknames as the preference to show up in posts, so the only reason to register again is if you’re not a known member who does not know their password and does not have access to their registered email (so there’s no way to prove you own the account).