Rule 7, Section 1, Article 5

No player, other than the snapper, shall encroach on the neutral zone after the ball is ready for play by touching the ball or an opponent or by being in the neutral zone to give defensive signals.

Rule 7, Section 1, Article 7

After the ball is ready for play and before the snap begins, no false start shall be made by any A player. It is a false start if:

a. A shift or feigned charge simulates action at the snap.

b. Any act is clearly intended to cause B to encroach.

c. Any A player on his line between the snapper and the player on the end of his line, after having placed a hand(s) on or near the ground, moves his hand(s) or makes any quick movement.

Rule 7, Section 5, Article 5

A forward pass, legal or illegal, is incomplete and the ball becomes dead when the pass touches the ground or goes out of bounds. It is also incomplete when a player in is the air possesses the pass and alights so that his first contact with the ground or with anything other than a player or game official is on or outside a boundary. When an incompletion occurs the down counts unless the pass is after a change of possession. If the pass is legal, the passing team next snaps the ball at the previous spot, unless lost after fourth down.

Rule 7, Section 3, Article 3

During a scrimmage down after a change of team possession, no player may hand the ball forward to a teammate.

Rule 7, Section 2, Article 1

After the ready-for-play, each player of A who participated in the previous down and each substitute for A must have been, momentarily, between the 9-yard marks, before the snap.

Rule 7, Section 5, Article 1

It is a legal forward pass, if during a scrimmage down and before team possession has changed, a player of A throws the ball with both feet of the passer in or behind the neutral zone when the ball is released. Only one forward pass may be thrown during the down.