12 players on the field after a timeout

[BroKen62]

Originally Posted by mbcrowder

Thanks!!!
Therein lies the rub. Substitute and replaced player have specific definitions. This applies to normal between-play action. This would not apply on the first play of a half, or after a COP or Timeout. There are no substitutes; no "replaced players" in the OP.

Let's go back to the comment in the FED casebook for just a moment:
COMMENT: In a related situation, if the covering official’s count of players has determined there are more than 11 prior to the snap, a dead-ball illegal substitution foul should be charged since a replaced player(s) did not leave within three seconds.

I don't see why this would not apply to any of the situations you suggest, but let's use the TO as an example, since it's listed. Assuming team A had 11 before the TO, it's not much of a stretch to consider that A12 is a substitute after the TO in the same way he would be considered such "during the normal between play action." Nothing in the rule suggests that the interval between downs cannot include a TO. So, according to this caseplay, if after a TO 12 players come onto the field, nobody tries to leave, then after 3 seconds we are supposed to blow it dead, throw a flag for dead-ball, IS. Granted, the RFP designation was given to us before they put in the 3-second stipulation, so I'll withdraw the RFP comment and stick with the 3-second timeframe, but still, I've got dead-ball IS and not "allow the play to happen and call IP."