1. Each team has a combined total of 8000 Life Points.
2. Each Team has Separate Fields (No sharing field zones)
3. You can Tribute/Fuse/Synchro Summon/Ritual Summon with your Partners Monsters with Permission.
From Link: If you are using your partner's Monsters for a Fusion or Ritual Summon then you cannot use Monsters that are in their Hand (must be on the field).
4. No player can attack a Team Directly unless both sides of the opposing fields are empty. (Example: If Player A and B's Field have no Monsters, then Players C & D can attack the opposing Team Directly.)
5. No shared Graveyards.
6. Cards that say "Opponents" refers to both players of the opposing Team, Cards that say "Opponent" refers to only one player of the opposing Team.
7. Cards that say "Both Players" or "Each Player" refers to every Player.
*Note* If anymore Rules or questions come to mind then they will be Posted here.