Ohio Rev. Code Ann. § 183.51
(A) As used in this section and in the applicable bond proceedings unless otherwise provided:
(12) "Pledged receipts" means, as and to the extent provided for in the applicable bond proceedings:
(G) Obligations may be further secured, as determined by the issuing authority, by an indenture or a trust agreement between the issuing authority and a corporate trustee, which may be any trust company or bank having a place of business within the state. Any indenture or 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:
(H) The bond proceedings may contain additional provisions customary or appropriate to the financing or to the obligations or to particular obligations including, but not limited to, provisions for:
(M)
(1) Subject to any applicable limitations in division (C) of this section, the issuing authority may also authorize and provide for the issuance of:
(O)
(S)
(1) Unless otherwise provided in any applicable bond proceedings, moneys to the credit of special funds may be invested by or on behalf of the issuing authority only in one or more of the following: