I believe that means they are not approved by your state to market to people in Iowa. You could join if you go to Disney World and sign the papers there - but they cannot talk to you or mail you anything when you're in Iowa.
They may be working on getting the approvals but just haven't been given the go-ahead yet by the state. New Yorkers are in the same boat at the moment.
Would someone please correct me if I'm not explaining this right.
Doreen in PA