Maryland Code, Natural Resources § 10-403

(a) A person may not hunt, purchase, sell, barter, exchange, or attempt to hunt, purchase, sell, barter, or exchange any game bird except as provided by federal or State laws and rules and regulations.

(b) A person may not hunt or possess any game bird in excess of the limits prescribed by federal or State laws and rules and regulations.

(c) A person may not hunt game birds at any time or in any manner on land or in waters within the boundary lines of any federal or State-owned or controlled migratory bird refuge unless permitted by federal or State laws or rules and regulations.