You need to ask the U.S. Authorities, in Europe coded boats can be used all over the place, I guess it's the old rule in the states only deal with guys from your own country, tried to buy some obsolete us forces equipment from the states and they wouldn't sell to anyone out side the U.S.
Boats that are used for towing are exempt from the "made in the USA" rule. You can get a exception for boats both over and under 5 ton. Here are the links of what you will need to know. My experience is that most Government types don't even know their own rules . USCG National Vessel Documentation Center, Fee Page
