Ohio Rev. Code § 306.37
A regional transit authority which proposes to acquire by purchase or otherwise, or proposes to construct, replace, improve, extend, enlarge, maintain, or operate any transit facility, and desires to raise money for any one or more of such purposes or for the purpose of repaying or refunding any outstanding issue of bonds of the regional transit authority or pay any obligation assumed by it or of repaying or refunding any outstanding issue of bonds or notes of any political subdivision issued to acquire, construct, replace, improve, extend, enlarge, or maintain any transit facility acquired by the regional transit authority or repay any advances or loans made to the regional transit authority by any person or political subdivision, may issue revenue bonds therefor which bonds shall not be secured by the general credit of the regional transit authority or by the general credit of the state or any political subdivision.
Such revenue bonds shall have all the qualities of negotiable instruments and shall be secured only by a pledge of and a lien on the revenues of the regional transit authority derived from rentals, fees, rates, charges, the authority's allocation of a tax levied under section 5739.026 of the Revised Code, all or any portion of a tax levied under section 5739.023 of the Revised Code by the authority, or other revenues from any transit facility of the regional transit authority as are designated in said resolution, including but not limited to the transit facility to be acquired, constructed, replaced, improved, extended, enlarged, or maintained with the proceeds of said bond issue, after provision only for the reasonable cost of operating and maintaining the transit facility of the regional transit authority so designated.
Said bonds shall further be secured by the covenant of the regional transit authority to maintain such rentals, fees, rates, charges, or other revenues as will produce revenues sufficient to meet costs of operating and maintaining such transit facility, to meet the interest, principal, and other requirements of such bonds, and to establish and maintain reserves for the foregoing purposes, and may be secured by a mortgage on any real property or interests therein acquired from the proceeds of such revenue bonds.The authority may not repeal, rescind, or reduce any portion of a sales tax levied under section 5739.023 of the Revised Code pledged to the payment of debt charges on such bonds while such bonds remain outstanding, and no portion of the tax pledged to the payment of debt charges on such bonds is subject to repeal or reduction by the electors of the authority or by the authority while such bonds are outstanding.
R.C. § 306.37