COURT AREA: The legal playing area includes all court area on either side of the center (net) line up to the walls and the dividing net between the courts. The centerline is considered to extend infinitely in either direction (i.e. it is illegal to contact the ball past the center line when outside the court boundaries). Any ball that contacts the ceiling may be played as long as it is on your side and you have hits left to play the ball. However, the ball is considered out of bounds if the ball crosses over to the other side of the court.