OSU-Michigan: Mouthpiece timeout

[BoomerSooner]

During the 3rd quarter of the OSU-Michigan game, OSU was required to use a timeout because a player didn't have his mouth piece in his mouth (it was in the helmet). The commentators said that the "forced timeout" was the right call, but after a quick scan of the NCAA rule book, I can't find support for the timeout being required. The only thing I could find was that the player should not be allowed to participate without the proper equipment, and that he would have to leave for a minimum of 1 play if play were stopped because of failure to wear the appropriate equipment unless a timeout is used.

Did I miss something? If so, please point me to the correct rule. I don't work college or have a dog in the fight, so this is really just a curiosity issue.