R 7-1-4

a. Before the ball is snapped all defenders shall be in bounds and behind their scrimmage line (offside). AR 7-1-4-I
b. After the ball is declared ready for play no defender shall touch the ball until after the snap is complete.
c. No defender shall use words or signals that disconcert opponents when they are preparing to put the ball in play.
d. A maximum of 2 players may establish themselves as a blitzer. If a player who signals is less than 7 yards from the scrimmage line or if a player is giving an invalid signal or if more than 2 players simultaneously keep their hand raised after the snapper has touched the ball, it is a foul for illegal signal. AR 7-1-4-II to VII
PENALTY – Ball remains dead, 5 yards, enforced from the dead ball spot. [S18] e. Any defender who has all parts of the body more than 7 yards away from the scrimmage line at the snap may cross the scrimmage line multiple times until the ball is dead. There is no requirement for a player requesting right of way to establish as blitzer and any player (> 7 yards) may rush the quarterback during the play.
f. All defenders less than 7 yards away from their scrimmage line at the snap shall stay behind their scrimmage line until the ball has been handed off, fake handed off or passed by the quarterback.
PENALTY – 5 yards, spot of foul is the scrimmage line, enforced from the scrimmage line. [S18]