I got a similar response from Conch today:

"Conservation and Fisheries have changed their policy for fishing off of a vessel here in the BVI’s as of April 1st where not only the person has to hold a valid fishing license but that the vessel needs to be registered as a commercial fishing vessel. We have opted not to register any of our vessels which means that you will unfortunately not be able to fish from the boat. You can still obtain a fishing license if you wish but will have to enjoy the sport from docks or land when you reach safe anchorage."

Maybe this is a good reason linger in USVI waters (or charter from USVI next time).