American Football Rules IFAF Approved Ruling 10-1-5:I

I. With fourth and eight, Team A gains four yards and the ball is declared dead, after which B1 is called for piling on. RULING: Team B personal foul. Penalty – 15 yards from the
succeeding spot. First and 10 for Team B (Rule 5-1-1-c). The clock starts on the snap. [Cited by 10-1-5, 5-1-1-c, 5-2-6]