American Football Rules IFAF Approved Ruling 3-4-3:III

III. A ball carrier, late in the second period, throws a backward pass out of bounds from behind or beyond the neutral zone to conserve time. RULING: Penalty – Five yards from the spot of the foul and loss of down. The clock starts on the ready-for-play signal. Note: If there is less than one minute remaining in the half, this foul comes under the 10-second runoff rule (Rule 3-4-4). [Cited by 3-4-3, 7-2-1 Penalty]