American Football Rules IFAF Approved Ruling 3-4-2:II

II. On a running play late in the half the Team A ball carrier is tackled inbounds. Team B players are deliberately slow to “unpile” in an obvious attempt to consume time and prevent the officials from making the ball ready for play. RULING: Team B foul for delay of game.
Penalty — five yards at the succeeding spot. The game clock will start on the snap (Rule 3-4-3). [Cited by 3-4-2-b-8]