a. Shift. After a huddle (Rule 2-14) or shift (Rule 2-22-1) and before the snap, all Team A players must come to an absolute stop and remain stationary in their positions without movement of the feet, body, head or arms for at least one full second before the ball is snapped.
Approved Ruling 7-1-2 I. After a huddle or shift, all Team A players come to a stop and remain stationary for one second. Then, before the snap, two or more simultaneously change their positions. RULING: All 11 Team A players must again stop for one second before the snap, otherwise it is a live-ball foul at the snap for an illegal shift. Penalty—Five yards from the previous spot (Rule 2-22-1).