Enforcement puzzle

[BoBo]

First off in the original play I am assuming when B fumbles it is going into team A end zone.

I think we can all agree if B accepts the penalty for IF and A accepts the penalty BIB we will be replaying the down.

If team B declines the penalty for IF, by rule the have recovered the ball with "clean hands". The penalty for BIB occurs behind the runner who is going into the endzone to score. If he were to score a TD or tackled before scoring we would enforce the penalty from the penalty flag aka spot of the foul. 10 yards 1st and 10 team B

BUT

The catch here is the fumble. Lets say there is no flag and the team B player going into the endzone of team A fumbles the football into and out of the endzone we have a touchback rewarded to team A.

SO

Team A would in the play have to decline the penalty of Team Bs BIB to take the results of the play.

With that all being said and as I have probably confused you and myself-

1. If team B accepts the penalty of IF on team A, then team A will accept the penalty on team B BIB and replay the down.

2. If team B declines the penalty of IF on team A, then team could decline the penalty of BIB on team B and should get the ball 1st and 10 on the 20 yard line.



sidenote if for some reason Team B declines, and team A accepts BIB then team B would get the ball 10 yards from the spot of the foul for BIB and 1st and 10.