State C is a WTO member state as well as a party to NAFTA. It has made no exact agreement under either GATS or NAFTA as to its road transport sector. Now tow freight corporations, 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 provide overland freight transportation services in State C using trucks operating out of terminals in State D as well as State E but using the roads in State C. May they do so? To what extent? Why?