There's message traffic on the BVI forum about boats being locked down due to some issue with a new propane safety regulation. Does anyone (e.g. CYOA) know exactly what the regulation is, and whether it applies to charter boats coming from USVI?
Jay Pederson posted from CYOA/Waypoint, on Facebook, that all their boats are legal on BVI safety and customs rule changes. I'm sorry that doesn't answer your question about the actual law, just confirms that charter companies in the USVI have knowledge about the law and at least one has stood up to say their fleet is current.