Williams Gateway Airport in Mesa, Ariz., and Roswell Industrial Air Center in Roswell, N.M., have been designated by the Customs and Border Protection Agency as user-fee airports. A user-fee airport does not qualify as an “international” or “landing rights” facility, but customs clearances are available on request for a fee (which is different for each designated facility and amounts to the pass-through cost the airport pays for such a service). Currently there are 37 user-fee designated airports.