When we entered last year without a decal the CBP officer at the Culebra airport would not talk to us until we called the Indiana office and applied for the permit over the phone. Then he agreed to take our money only after it showed up on his computer. We didnt have 50 cents and he wouldnt take $28 for the $27.50 decal and keep the change so we had to go to a local bar and get change for a dollar. He was a very nice guy after we came back with the exact change. What a waste of an hour.