goaltending question

[tjksail]

This definition, at http://www.hickoksports.com/glossary...ml#goaltending
is the way I was taught.

"goaltending
Interfering with a shot while it is on its downward flight toward the basket, while it is on its upward flight toward the basket after having touched the backboard, or while it is in the cylinder above the rim. If committed by a defensive player, the shot counts. If committed by an offense player, it is a violation and the ball is awarded to the opposing team for a throw-in."

I'am sure you are right, but can you please explain what is wrong with this def.? Thanks