(a) All moneys received from any revenue bonds issued and sold must be applied solely for the purpose for which the bonds are authorized, or to the sinking fund established for the payment of the bonds. These moneys are trust funds for those purposes.
(b) There is a lien on such moneys in favor of the holders of any bonds or any trustee appointed with respect to the bonds, until the moneys are applied to the purposes for which the bonds are authorized or to the sinking fund for repayment of the bonds. (1992 L.M.C., ch. 35, § 2.)