Ohio Rev. Code Ann. § 6111.024
(B) Level three review shall apply to the filling of a category 2 or a category 3 isolated wetland described in division (A) of this section and shall require all of the following:
(D)
(E) Mitigation for the proposed filling of a category 2 or a category 3 isolated wetland that is subject to level three review shall be conducted in the following preferred order: