Ohio Revised Code Title V. Townships § 511.52

(A) Promote the importance of historic preservation throughout the unincorporated territory of the township;

(B) Maintain a register of historic properties located within the unincorporated territory of the township.  Upon recommendation of the commission, the board of township trustees by resolution may designate appropriate properties as registered properties;

(C) Protect the unique historical and architectural character of registered properties and promote the conservation of the registered properties by considering applications, and issuing certificates, for exterior alterations at registered properties.