[NFHS Rules] Sequence of events

Originally Posted by BillyMac

Penalized if discovered while being violated: Having more than five team members participating simultaneously, if recognized by an official before the ball becomes live following the first dead ball. If it was not recognized by either official, but was called to their attention after the ball became live following the first dead ball, it is too late to assess any penalty.

When did excess of 5 become a CE? Surley the Master of Myths was joking?