Penalty yardage added to any gain. The ball carrier may not lower his head into a defensive Player. Spins are legal. Hurdles of down players are legal. Kick-off or punt from 20 yd line after safety.
Direct snaps are legal.
The position of the ball when de-flagged is the spot of the ball. Stiff Arms are illegal. Stripping of the ball is illegal. Between the 20 yd lines. Teams must use opposite side lines.