The USCG can directly answer any questions about documentation and they're pretty good about it.
Be aware that if you have any problems with your transaction or title...you're going to be limited to recourse under Trinidadian laws. You might want to contact a broker or attorney down there to find out what complications that may bring.
IIRC it is or recently was still legal to use TBT bottom paint in Trinidad, and it is illegal to bring that into the US--even if it is on your hull. Little things that can get you.