Funds Held by Trustee After Payment of Bonds. If, after the principal of and interest on all Bonds and all costs incident to the payment of Bonds have been paid in full, the Trustee holds unexpended funds received in accordance with the terms hereof, such unexpended funds shall, except as otherwise provided in this Lease and the Indenture and after payment therefrom to the Issuer of any sums of money then due and owing by the Company under the terms of this Lease, be the absolute property of and be paid over forthwith to the Company.