Some rules are, no hitting below the belt, no holding, tripping, kicking, headbutting, wrestling, biting,spitting on, or pushing your opponent. Also you can't hit with your head, shoulder, elbow, or forearm.
The rules of boxing is that it is a sport, it is not ment to kill or cause great harm. Protect is the best defense in boxing, bob and weve, and the hook and the jab or the greatest punching defenses. and now below the belt hits are allowed and always keep your guard up