Unrep Sub: Say Something or Stay Mum?

[AtlUmpSteve]

NCAA directs us to use preventative officiating to advise a coach that a lineup is innaccurate, or a substitution is illegal, and attempt to prevent it. But, if the coach insists, accept it, and let the opponent have the opportunity to take advantage.

Just as has been preached in most other associations.

With respect to an unreported sub, that should be treated as an appeal play. Not reported to you, so you cannot comment on it until asked.