Maryland Code, Public Safety § 5-125

(a) An approved firearm application is valid only for the purchase, rental, or transfer of the regulated firearm listed in the firearm application.

(b) A licensee or other person may not sell, rent, or transfer a regulated firearm to a firearm applicant whose firearm application is placed on hold because of an open disposition of criminal proceedings against the firearm applicant or disapproved, unless the hold or disapproval has been subsequently withdrawn by the Secretary or overruled by a court in accordance with § 5-127 of this subtitle.