Item 3: End Zone Catches. If a player controls the ball while in the end zone, both feet, or any part of his body other than his hands, must be completely on the ground before losing control, or the pass is incomplete.
Note: In the field of play, if a catch of a forward pass has been completed, after which contact by a defender causes the ball to become loose before the runner is down by contact, it is a fumble, and the ball remains alive. In the end zone, the same action is a touchdown, since the receiver completed the catch beyond the goal line prior to the loss of possession, and the ball is dead when the catch is completed.