[FMadera]

Well, it all depends. Who represented the team at the coin toss? If the varsity coach was at the coin toss, then he is the "head coach" during that match, and would be the only person I, as an official, would listen to. I don't take sub or time out requests from assistant coaches.

Now, if one of the assistants was at the coin toss, then certainly I would listen to any of their requests, as they would be the head coach for that match.

Was the varsity coach coaching from behind the bench, or silently watching? If he was coaching, then we have someone coaching while not seated, and either he would have to sit on the bench or refrain from coaching (assuming he was standing behind, and not in bleachers located behind the team bench with other people in the stands).