My father in law that lives in VA about hlf the year and the other half in Florida brought his boat home and is planning on fishing the Potomac above 301. His boat is licensed in florida. He will be fishing for catfish and wants to do some crabbing. His Florida license registers him with the saltwater registery. He is trying to figure out if he needs to buy a VA saltwater licence for that area or get the Potomac River Marine Comm License for taking people out on his boat. We now that each individual on the boat must be registered with the free saltwater registery. Anyone fish that area that can help us understand the laws.