Ohio Rev. Code § 503.59
A board of township trustees that has entered into an agreement with the Ohio air quality development authority under section 3706.051 of the Revised Code may levy, in accordance with that agreement, a special assessment upon real property located in the township specially benefited by an air quality facility that is the subject of that agreement.
An assessment levied under this section shall be made in any manner authorized under section 727.01 of the Revised Code and, except as otherwise provided in this section, in accordance with the procedures prescribed for special assessments levied by municipal corporations under Chapter 727. of the Revised Code, except that where that chapter refers to a municipal corporation, it shall be deemed to refer to the township and where that chapter refers to the legislative authority of a municipal corporation, it shall be deemed to refer to the board of township trustees. All rights and privileges of an owner of property subject to an assessment levied under that chapter shall apply to the owner of property assessed under this section.
No special assessment may be levied under this section unless the owner of the property to be assessed files a written statement with the board of township trustees requesting that the assessment be levied.
R.C. § 503.59