Ohio Rev. Code Ann. § 5121.061

The authority of the department of developmental disabilities to modify support charges pursuant to section 5121.04 of the Revised Code shall not be exercised until the resident or liable relative has petitioned the department for modification as provided in section 5121.07 of the Revised Code and has offered to the department satisfactory proof of the resident's or liable relative's earnings and assets. The department may modify the charges if its investigation warrants such modification.