12th man

[BoBo]

A has the ball 1st and 10 on A's 20

B has 12 men on the field. Ball is snapped and A gains 30 yards on the play.

Flag thrown for Illegal Participation.

Penalty Enforcement options???

Sidenote. How does your crew handle this?

1.Do you try and kill it before the play starts? illegal sub.

2.Allow the defense to try and get off the field?
if player is leaving field? illegal sub.
player is leaving but caught up in the play? illegal part.

Offense as the white hat i try and kill it quickly before play and get Illegal substitution. (I hate hearing the old "they broke the huddle with 12 players" comment. not in fed rules boys. allow the team to complete the substitution in a timely manner, becomes the WHs perception then)