The server is now open and will be whitelisting more people.
In case you can't find the "Apply here" button, here is a link:
1) Be nice to everyone / Respect everyone.
2) Do not grief.
3) Do not steal. (Borrowing without permission is stealing too)
4) Have fun, but be mature.
5) Use common sense.
6) If you didn't get this from 5), NO CHEATING.
7) No PVP without consent.
8) Behave yourself, Staff will ban you if they think you are bad for the server.
9) ... Have fun! :)
Read the rest here: BadgerCraft Rules
If you have any further questions, ASK! :)