Is the Wait Listing for Worlds done by State or as one large list?

If a team that qualifies for World’s via a State Championship never registers for World’s, does that World’s slot go to that state’s waiting list or does that slot go into one big waiting list generated for World’s?

I guess what I’m asking: does each state have its own waiting list or is there only one global waiting list, from which everyone wanting to go to World’s could be selected?