One of the minimal rules that will be enforced is attacking the serve. Throughout all levels from high school to professional, you cannot block or attack the serve while standing in first 10 feet from the net on the court. So any player standing within 10 feet of the net cannot send the ball back over on the first shot through an attacking or blocking motion. If they do this, the play will be considered dead and a point awarded to the serving team.
How do you clarify “attacking” or “blocking” the serve for the growler? The easiest way we can come up with is if you leave your feet to hit the ball. As long as you don’t leave your feet, a front row player may pass the ball back over the net.