I understand there is a "COP" proviso in Rule 10-5-6; but does it mean no COP at any time during the down; or does it mean COP at the end of the down?
Play: 3rd and 20 from A's 30. A1 is roughed on a legal fwd pass which travels beyond the LOS. A2 catches the pass runs to B's 45 where he fumbles. B1 recovers and begins to return when he is hit and fumbles at A's 30. A4 then recovers the ball at his 25 and runs to B's 35.
The result of the play is 1st and 10 for A from his 35. But, could A take the RTP penalty from B's 35 (the end of the "last run"); or is he "stuck" with previous spot enforcement?