Rule 3 is all about keeping your beak out of the game. No, seriously, it's about not being a buzzkill. You know, like, a buzzkill.
When you're a referee, you're not there to kill the buzz. You're there to keep the peace. And, you know, keep your beak out of it. Unless you're refereeing a game of "Buzzy the Beekeeper," in which case, you can totally be a buzzkill.
Subrule 3a: Don't be a beak-brained fool. Don't get too close to the action, or you might just get your beak in the way.
Subrule 3b: When in doubt, take a step back and let the players sort it out. Unless you're refereeing a game of "Buzzy's Beak-Ball," in which case, you'd better be ready to jump in.