Basket interference occurs when a player:
ART. 1 . . . Touches the ball or any part of the basket (including the net) while the ball is on or within either basket.
ART. 2 . . . Touches the ball while any part of the ball is within the imaginary cylinder which has the basket ring as its lower base.
ART. 3 . . . Touches the ball outside the cylinder while reaching through the basket from below.
ART. 4 . . . Pulls down a movable ring so that it contacts the ball before the ring returns to its original position.