Rule Clarification: Running the Ball inside the "20"

If the ball is on or inside the "20" (the 2-PAT line) the offense cannot advance the ball or score by rushing it.

If the ball is inside the no rushing zone but then a penalty occurs that pushes the new line of scrimmage outside of the "20", the offense is now once again able to advance the ball or score by rushing.

Note: Rule courtesy of Mando and Toad.