illegal substitution or something else?

[Texoma_LJ]

If I am able to prevent a foul before it happens, all the better for the flow of the game, especially something along the sidelines that could be prevented with a little constructive officiating. If I am able to stop the player before he puts the headset on, no problem. If however, I am unable to do so because of attending to other duties at the time, but see it before the dead ball period ends, I would definitely want to explain the situation to the HC, what options are available, and the result of each of those desicions. He can make his own decision from there. He may not even be aware of what is happening on the sideline himself and, I am sure, would be highly grateful to have the option of taking the player out for one play rather than taking a 15 yard hickey for something that could have been prevented.