Prohibiting certain persons who are licensed to catch crabs from selling cooked hard or soft crabs or crab meat harvested by the license holder; prohibiting seafood dealers and mobile seafood vendors from purchasing cooked hard or soft crabs or crab meat from certain persons who are licensed to catch crabs; requiring a mobile seafood vendor to obtain a seafood dealer license; and requiring seafood dealers and mobile seafood vendors to comply with applicable Maryland Department of Health requirements.