State C is a WTO member state and a party to NAFTA. It has made no exact agreement under either GATS or NAFTA as to its road transport sector. Currently tow freight companies one from State D (a WTO member state) as well as one from State E (a party to both the WTO and NAFTA), wish to deliver overland freight transportation services in State C using trucks operating out of stations in State D and State E however using the roads in State C. May they do so? To what extent? Why?