Ohio Rev. Code Ann. § 1545.35

An active park district created under this chapter and to which no territory has been annexed under section 1545.15 of the Revised Code may be dissolved under section 1545.36 or 1545.37 of the Revised Code. An active park district to which territory has been annexed under section 1545.15 of the Revised Code may be dissolved only under the applicable provisions of section 1545.37 of the Revised Code. A park district that has been inactive for five years may be dissolved under section 1545.38 of the Revised Code.