Illegal Substitution vs Participation

[Theisey]

Depends on what your supervisor of officials wants, which is some areas will contradict the actual rule.
I happen to be in camp ground where we do not let the play start and enforce only the 5 yard penalty.
If that can't be done because the count is late or the snap occurs before the recount is completed, the IP is enforced per rule.
That means you cannot tack it on to the end of the run.