A violation called while a player (a) touches the ball or any part of the basket while the ball is within the imaginary cylinder that exists above the rim, (b) touches the ball while reaching up through the rim from below, or (c ) hangs on or yanks down the rim or the net while the ball is being shot. When the violation is called on a defensive player, the shooter is awarded the field goal. When the violation is called on an offensive player, the field goal is disallowed.
Under the International Basketball Federation (FIBA) rules, however, once the ball hits the rim, any player is allowed to touch or rebound it, regardless of whether or not the ball is within the imaginary cylinder above the rim. There were reports in 2010 that FIBA wanted the NBA to implement this rule.