§ 860. Moneys of the agency. The agency shall have power to contract with the holders of any of its bonds or notes as to the custody, collection, securing, investment and payment of any moneys of the agency or any moneys held in trust or otherwise for the payment of bonds or notes or in any way to secure bonds or notes and to carry out any such contract. Moneys held in trust or otherwise for the payment of bonds or notes or in any way to secure bonds or notes and deposits of such moneys may be secured in the same manner as moneys of the agency, and all banks and trust companies are authorized to give such security for such deposits.