this just in....

Marriott has sent out a notice that associates are to ID guests for ALL negotiated contract rates. That means ALL of the rates that are on your wonderful list should be ID'd now. Whether or not the front desk associate actually asks for it is another deal, but be prepared to be asked.
As for contractors (like yourself keeton), unless you show work papers with some sort of letterhead or a company ID badge or card, its likely you will run into some trouble.