Any level is excepted as long as you contribute to the guild.
1. You know what the **** your doing and not asking questions about everything.
2. Donate 1g and 1-30k EXP every day. If you don't I do a clean sweep of the guild and see who hasn't done anything then kick them.
3. Communicate with others.
4. Contribute to the Guild Warehouse. Including items and guild money. (Does NOT include donations, you still have to donate)
If you are wondering why you have to donate, it's because it helps level up the guild.
Again, any player is welcome to join, just as long as they contribute and are dedicated to the guild. (There will be a clean sweep 3/30/13)