[waltjp]

Under the All But One principle -

For running plays, the basic spot is the end of the run. Fouls committed by the offense behind the basic spot are penalized from the spot of the foul.

For example -

2nd and 5 for A from B's 30 yard line.

A12 hands the ball to A40, who runs for an apparent TD.

(a) During the play A65 is flagged for holding at B's 22.

(b) During the play A65 is flagged for holding at B's 10.

The basic spot is the goal line. In both (a) and (b) above the foul was committed behind the basic spot. This is the spot where the penalty is enforced.

Results -

(a) A is penalized 10 yards from B's 22. 2nd and 7 from B's 32.

(b) A is penalized 10 yards from B's 10. 1st and 10 from B's 20.