Ohio Rev. Code § 6119.141
Any holders of water resource revenue bonds or notes issued under Chapter 6119. of the Revised Code, or any of the coupons appertaining thereto, and the trustee under any trust agreement, except to the extent the rights given by such chapter may be restricted by the applicable resolution or such trust agreement, may, by suit, action, mandamus, or other proceedings protect and enforce any rights under the laws of the state or granted under such chapter, trust agreement, or the resolution authorizing the issuance of such bonds or notes, and may enforce and compel the performance of all duties required by such chapter, or by the trust agreement or resolution, to be performed by the regional water and sewer district or any officer thereof, including the fixing, charging, and collection of rentals or other charges.
R.C. § 6119.141