American Football Rules IFAF Approved Ruling 7-1-3:I-II
I. A21 is legally on the end of the line of scrimmage next to A88, who is in a three-point stance. Team A stops for one second while A21 and A88 are in the above positions, and then A21 moves to a legal backfield position and stops. Then A88 shifts to a wider position on the line. RULING: Legal if both A21 and A88 are stationary at the snap (Rules 2-22-1 and 7-1-4). [Cited by 2-22-1-a, 7-1-4-c]
II. A21 is legally on the end of the line of scrimmage next to A88, who is in the stance of a restricted lineman. Team A has stopped for one second when A21 leaves the line of scrimmage and goes in motion into the backfield. A88 shifts to a wider position on the line. RULING: A88 may break his three-point stance since he is now on the end of the line of scrimmage, but Team A must stop again for one second before the snap to make the play legal (Rule 7-1-4). [Cited by 2-22-1-a, 7-1-4-c]