[bigjohn]

Here are the 2 situations that started all of this.

c) 2/10 from A's 20. At the last second before the ball is snapped A88 realizes he should be on the field and steps on the field just inside the sideline and catches a quick pass from the QB and runs down field and scores a TD.

Do we have a foul? If so what is the foul?
Where will the yardage be marched off from and how many yards?
What will be the next down and distance and from where?

D) 2/10 from A's 20. At the last second before the ball is snapped A88 realizes he should be on the field and steps on the field just inside the sideline and catches a quick pass from the QB and runs down field and gets tackled at B's 10 yl.

Do we have a foul? If so what is the foul?
Where will the yardage be marched off from and how many yards?
What will be the next down and distance and from where?

What I'm trying to get at here is where is the penalty enforced from and why during a running play, loose ball play and also for a player/coach that comes off the sideline or also a deceive play.
Any help with this would be greatly appreciated.