Md. Code, Health - General § 21–347

(a) Unless the shellfish contained in the food comes from a source certified by the appropriate agency responsible for interstate shellfish shipment, a person may not import into this State any food that contains shellfish.

(b) Each processor of food that contains shellfish that is imported into this State shall:

(1) Keep on file proof that the shellfish is from a source certified by the appropriate agency responsible for interstate shellfish shipment; and

(2) Provide this proof to the Department on request.