Ohio Rev. Code Ann. § 133.02
(B) Unless a judicial action or proceeding challenging the validity of public obligations or of fractionalized interests in public obligations is commenced by personal service on the chief executive officer or legal officer or fiscal officer of the issuer and, if applicable, the obligor, prior to the initial delivery of the public obligations or the fractionalized interests in public obligations, the public obligations or the fractionalized interests in them and the proceedings relating to them are incontestable and the public obligations or the fractionalized interests in them shall be conclusively considered to be and to have been issued, secured, entered into, payable, sold, executed, and delivered, and the proceedings relating to them taken, in conformity with all legal requirements if all of the following apply:
(D) As used in this division, "tax compliance payments" means any amounts determined or estimated as amounts required to be paid to the federal government in order to maintain the exclusion from gross income for federal income tax purposes of interest on those obligations, including any amounts computed at the time to represent the portion of investment income to be rebated, or amounts in lieu of or in addition to any rebate amount and any penalty or interest to be paid, for that purpose pursuant to the Internal Revenue Code; and "public obligations" includes any bond within the meaning of section 150(a) of the Internal Revenue Code. Notwithstanding any other law, an issuer and an obligor may agree, in specific or general terms, to do or cause or require to be done all things necessary for, and not to do or permit or authorize to be done anything that would adversely affect, the exclusion of interest on public obligations or on fractionalized interests in public obligations from gross income for federal income tax purposes under the Internal Revenue Code, or the classification or qualification of the public obligations or the interest on the public obligations or fractionalized interests in public obligations for, or their exemption from, other treatment under the Internal Revenue Code, including compliance with the provisions for tax compliance payments to the United States in accordance with the Internal Revenue Code. Those actions and covenants and compliance therewith shall be valid, incontestable, final, and conclusive to the extent that they support that exclusion from gross income or those classifications, qualifications, or exemptions. The authorization in this division is solely for the purpose of satisfying such federal conditions or requirements, and is in addition to and not a limitation upon other authorization granted by or pursuant to law or the Ohio Constitution, and does not preclude or exclude any actions or covenants by the issuer or obligor, or its officer, to satisfy the federal conditions or requirements for the purpose, including actions and covenants previously taken or made. Subject to the terms of those covenants, compliance with covenants referred to in this division by the issuer or obligor and its officers are acts specifically enjoined by law as duties resulting from their office, trust, and station for purposes of section 2731.01 of the Revised Code. The issuer or obligor, and its officers, employees, and agents responsible in the circumstances, shall do all things necessary or appropriate to comply with such covenants and shall take all actions to account for, calculate, report, make available, and make tax compliance payments pursuant to the Internal Revenue Code to the extent required to comply with such covenants. In order to protect the tax exemption of interest or other qualification, classification, or exemption for tax purposes, and to reduce tax compliance payments:
(1) Moneys from the funds to which any such interest is credited, and from any fund that is generally available for the general purposes of the issuer or obligor, available for the purpose of the securities issue, or available for operating and maintenance expenses of any improvements financed or refinanced by that issue or of any system or enterprise of which those improvements are a part, shall be appropriated and are deemed appropriated for all purposes to the payment of such amounts pursuant to such covenant, and may be so appropriated in the absence of such a covenant. Subject to the provisions of the applicable proceedings and notwithstanding any statutory or administrative limitations on the use or transfer of those funds or receipts, the appropriate official of the issuer or obligor may: