Maryland Code, Natural Resources § 4-2A-08

(1) Importation into the State of fish which may be lawfully imported into the United States or lawfully taken and removed from another state;

(2) Entry into this State or the possession, transportation, exportation, processing, sale, offer for sale, or shipment of any fish which is designated an endangered or threatened species in this State but not in the state where originally taken, if the person engaging in the activity demonstrates by substantial evidence that the fish was lawfully taken and lawfully removed from the state of origin; or

(3) Entry into this State or the possession, transportation, exportation, processing, sale, offer for sale, or shipment of fish which are lawfully purchased for, or which are products of, authorized aquaculture operations in nontidal ponds, lakes, or impoundments, provided the fish are identified as such in accordance with regulations adopted under § 4-11A-02 of this title.

(2) A person may possess striped bass or hybrids from another state while transporting them through this State for sale in another state if the person can demonstrate by substantial evidence that the fish were lawfully taken and removed from the state of origin.

(3) A person who possesses a valid license to deal in finfish under § 4-702 of this title may possess, store, and process striped bass or hybrids of striped bass lawfully taken in another state or in waters within the jurisdiction of the Potomac River Fisheries Commission, in conjunction with transporting them through this State for sale in another state.