The penalty for a forward pass not from scrimmage is 5 yards.
Penalties for fouls that occur prior to a pass or kick from behind the line of scrimmage are enforced from the previous spot. However, penalties for fouls during a free ball or when the offensive team fouls behind their line are enforced from the spot of the foul.
Fouls enforced in the field of play cannot penalize the ball more than half the distance to the offender's goal line.
If the offensive team commits pass interference in their opponent's end zone, the defense has the choice of 15 yards from the previous spot and a loss of down, or a touchback.