Blood and the Timeout

[tjones1]

Question: If A1 and B1 both have blood on them, however as officials we don't see it on B1. Team A's coach requests a time-out(full) so that A1 can stay in the game. While I am on the block during the time-out I notice B1 changing shirts or whatever. Do I charge Team B with a time-out IF a) B1 changes into another shirt but the same number. I realize we would have to charge them a time-out if they switched numbers, because we would have to change it in the book. Thanks