Under normal circumstances they would obviously just fax/email over their copy of the list. Here it seems the Sens concluded the list was old, and thus attested that there was no list in force. No fuss was made about it because Vegas wasn't on the list to begin with.Fine, but can you please explain to me how you submit written proof over a phonecall?
I doubt there is a formal process for proving a document doesn't exist, or that process would have likely caught this error.