From the OM:
FUEL FILTER
Your vehicle is equipped with a lifetime fuel filter that is integrated with the fuel
tank. Regular maintenance or replacement is not needed.
EXCEPTIONS
California fuel filter replacement: If you register your vehicle in California, the California Air Resources Board has determined that the failure to perform this maintenance item does not nullify the emission warranty or limit recall liability before the completion of your vehicle's useful life. Ford Motor Company, however, urges you to have all recommended maintenance services performed at the specified intervals and to record all vehicle service.