American Football Rules IFAF Approved Ruling 6-3-2:III-IV

III. Team A’s punt goes beyond the neutral zone and is first touched by A80, then picked up by B40, who runs five yards and fumbles. A20 picks up the fumble and scores. During A20’s run, B70 holds. RULING: The score does not count. Five- and 10-yard penalties are not administered on the try or the succeeding kickoff. The penalty for Team B’s foul is declined by rule because there is no enforcement spot. The ball belongs to Team B at the spot of illegal touching (Rule 10-2-5-a-2). [Cited by 10-2-5-a-2, 6-3-2-b]
IV. Team A’s punt goes beyond the neutral zone and is first touched by A80, then picked up by B40, who runs five yards and fumbles. B70 holds during B40’s run. A20 picks up the fumble and scores. RULING: The score does not count. Five- and 10-yard penalties are not administered on the try or the succeeding kickoff. Because the illegal touching provides an enforcement spot, the penalty for Team B’s foul may be enforced, per Rule 5-2-4. The ball belongs to Team B, either at the spot of illegal touching if Team A declines the penalty, or at the spot after the enforcement if Team A accepts the penalty (Rules 10-2-2 and 10-2-5-a-2). [Cited by 10-2-5-a-2, 6-3-2-b]