All of this (book checking and verification) is local.
Back when I officiated in TN, we took the book back to the other side of the court and verified every number on the floor and ensured that the book was perfect.
Now, I count up the total number of players and only concern myself if there are more warming up than there are listed in the book. It's on the coach if there's an error beyond this.
I like putting the responsibility on the coach, myself.
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