You Make the Call...

[BroKen62]

Originally Posted by bisonlj

We talked about it in the locker room and knew that even if we flagged it, it would not have extended the period so the game was over either way.

Actually, it did make a difference. If you had thrown the flag for illegal substitution or illegal participation, since both of those are live ball fouls, A would have had the opportunity to run an untimed down. If you got them for nonplayers being on the field, that's treated as a dead ball unsportsmanlike, therefore no untimed down.
3.2. ART. 3 . . . A period must be extended by an untimed down if during the last timed down of the period, one of the following occured:
a. There was a foul by either team and the penalty is accepted, except for
those fouls listed in 3-3-4b.

ART. 4 . . . A period shall not be extended by an untimed down if during the
last timed down of the period, one of the following occurs:
a. When the defense fouls during a successful try/field goal and the offended
team accepts the results of the play with enforcement of the penalty from
the succeeding spot.
b. There was a foul by either team and the penalty is accepted for:
1. unsportsmanlike fouls,
2. non-player fouls,
3. fouls that specify a loss of down, or
4. fouls that are enforced on the subsequent kickoff as in Rule 8-2-2.
NOTE: The score is cancelled in the event of an accepted foul that specifies a loss of down.