Md. Code, Business Regulation § 11–632

(a) A horse shall be registered with the Advisory Committee before the horse may start in a race of the Foaled Stakes Program.

(b) A horse may be registered with the Advisory Committee only if the horse was foaled in Maryland as shown by a foal certificate from the United States Trotting Association and:

(1) the breeder of the horse has maintained a place of abode in Maryland for more than 9 months immediately before registration;

(2) the breeder of the horse keeps breeding stock continually in Maryland;

(3) the horse was conceived during the previous season by the horse’s dam being covered by a Maryland stallion registered with the Advisory Committee; or

(4) the horse’s dam was sent to Maryland to foal and after foaling was covered by a Maryland stallion during the season of the horse’s birth.