Officers may ask any person entering or leaving a free trade zone (as designated by the Treasury) questions with respect to any goods. That person shall, if required by the officer, produce those goods for examination at such place as the Commissioners may direct. Officers may board a vehicle at any time while it is entering or leaving a free trade zone search any part of it. Officers may, at any time, enter upon and inspect a free trade zone and all buildings and goods within the zone.