In no case may the ball be played from below the waist level with the hands apart. Hands must be together, and the ball passed using the forearms. Any ball landing on a boundary line is good. The ball must pass over the net completely within the tapes on either side of the net, or within their infinitive vertical extension. Any ball contacting the net outside the tape is out.
Any ball contacting the ceiling, lights, walls or basketball backboards or rims is out.
A player may place his foot on, or above, the center line during a play. A player may not be completely over the center line with any part of his body. The foot may be over the line, as long as some part of it is still touching, or is above the center line. This rule applies only to feet. Any other extremities may not contact the opponents court during play.