Maryland Code, Insurance § 23-101

(i) by which an insured or prospective insured promises to pay a premium finance company the amount advanced or to be advanced under the agreement, together with interest and a service fee, to an insurer or an insurance producer in payment of premiums; and

(ii) that contains an assignment of or is otherwise secured by the unearned premium or refund obtainable from the insurer on cancellation of the insurance contract.