The initial down in each series is the First Down. If it is a charged down, subsequent charged downs are numbered consecutively (i.e., second down, third down, or fourth down) until a new series is declared for either team (7-3).
Item 1. Down by Contact. Whether a player was down by contact while in possession of the ball.
A touchdown is scored when:
The ruling on the field is an incomplete pass out of bounds.
A player is in possession when he is inbounds and has control of the ball with his hands or arms.
To gain possession of a loose ball that has been caught, intercepted, or recovered, a player (a) must have complete control of the ball with his hands or arms and (b) have both feet or any other part of his body, other than his hands, completely on the ground inbounds, and, after (a) and (b) have been fulfilled, perform any act common to the game (e.g., tuck the ball away, extend it forward, take an additional step, turn upfield, or avoid or ward off an opponent). It is not necessary that he commit such an act, provided that he maintains control of the ball long enough to do so. This rule applies in the field of play, at the sideline, and in the end zone.
Notes:
If a player who has completed the first two, but not the third requirement for possession, contacts the ground and loses control of the ball, there is no possession if the ball hits the ground before he regains control, or if he regains control out of bounds. If a player would have caught, intercepted, or recovered a ball inbounds, but is carried out of bounds, player possession will be granted (8-1-3-Note 5).