American Football IFAF Approved Ruling 9-3-3:I-IV, VI-VIII

I. A6 is advancing the ball. During the run, A12 vigorously blocks B2 with a rough push in the back above the waist. RULING: Illegal block in the back. Penalty — 10 yards. [Cited by 2-3-4-a, 9-3-3-a-2, 9-3-6]
II. A teammate of the forward passer or ball carrier, while charging across the neutral zone, contacts an opponent with his hands and arms not parallel to the ground or his hands cupped or closed but with the palms not facing the opponent. RULING: Legal use of hands. [Cited by 2-3-4-a, 9-3-3-a-2]
III. A teammate of the forward passer or ball carrier, behind the neutral zone, has his arms parallel to the ground and contacts an opponent above the shoulders. RULING: Illegal use of hands. Penalty — 10 yards or 15 yards for personal foul, previous-spot enforcement. Safety if the foul occurs behind Team A’s goal line. [Cited by 2-3-4-a, 9-3-3-a-2]
IV. A teammate of the forward passer or ball carrier delivers a blow with the hand(s) closed to an opponent below the shoulders. RULING: Personal foul. Penalty — 15 yards. Enforce at the previous spot if foul occurs behind the neutral zone. Safety if the foul occurs behind Team A’s goal line. [Cited by 2-3-4-a, 9-3-3-a-2]
VI. A2’s hands contact defensive player B2’s back when B2 spins to avoid A2. A2 keeps his hands on B2’s back while B2 advances toward the forward passer. RULING: Legal block. [Cited by 2-3-4-a, 9-3-3-a-1-b, 9-3-3-a-2]
VII. A2’s hands contact defensive player B2 when B2 spins to avoid blocker A2, whose hands then contact B2’s back. After A2’s hands lose contact with B2, A2 advances and pushes B2 in the back. RULING: Illegal block in the back. Penalty — 10 yards. Enforce at the previous spot if the foul occurs behind neutral zone (Rule 2-3-4). Safety if the foul occurs behind Team A’s goal line. [Cited by 2-3-4-a, 9-3-3-a-1-b, 9-3-3-a-2, 9-3-6]
VIII. A1 in, beyond or behind the neutral zone contacts an opponent with an open hand or with hands closed or cupped and palms not facing the opponent. RULING: Legal block. [Cited by 9-3-3-a-2]