Illegal substitution?

[Adam]

Originally Posted by BigCat

Suppose A1-5 are in game. A6 is at table but doesn't provide a number of player he replacing. Ball out of bounds. You beckon A6 in. He crosses the boundary and enters court. Walks to end line for the throw in. A3 now mouths off to point you call a T on him. What do rules say you do at this point?

I'm just doing a player T, quite frankly, rather than apply the indirect T to the coach. If the situation is unclear, I'm going to err on the side of caution. The case play you referenced earlier applies to a fight, but a fight is sufficiently rare and the penalties are intentionally harsh that I'm not going to apply the case play to any other situation.