Ohio Rev. Code Ann. § 151.40
(A) As used in this section:
(6) "Pledged receipts" means, as and to the extent provided in bond proceedings:
(B)
(G) Obligations may be further secured, as determined by the issuing authority, by a trust agreement between the state and a corporate trustee, which may be any trust company or bank having a place of business within the state. Any trust agreement may contain the resolution or order authorizing the issuance of the obligations, any provisions that may be contained in any bond proceedings, and other provisions that are customary or appropriate in an agreement of that type, including, but not limited to: