6 on the Court -- unnoticed...

[Nevadaref]

Find the rule which states when a substitute becomes a player IF THE ENTRY ISN'T LEGAL. It states when the ball becomes live. That is when the team member participates.

Additionally, there is the situation in which a team member with an illegal jersey (or not listed on the team roster) reports to the scorer as a substitute. If the scorer informs the officials of the problem at the time of the attempted entry, then the coach has the ability to withdraw the team member and avoid the penalty. This scenario was detailed in the NFHS Simplified & Illustrated book with the caption which read something like, "Number X won't participate."