Ohio Rev. Code Ann. § 3318.26
(E) The bond proceedings may contain additional provisions as to:
(J) In the discretion of the issuing authority, obligations may be secured additionally by a trust agreement or indenture 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 such agreement or indenture 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 or indenture of such type, including, but not limited to:
(P) The issuing authority may covenant in the bond proceedings, and any such covenants shall be controlling notwithstanding any other provision of law, that the state and applicable officers and governmental agencies of the state, including the general assembly, so long as any obligations are outstanding, shall: