Ohio Rev. Code Ann. § 755.20

When a deed of gift, devise, or bequest of property or funds to a municipal corporation for park purposes requires the investment or change of investment of the principal of such property or funds, or any part thereof, to be made upon the approval of an advisory committee appointed by a court or judge, or by an advisory committee appointed by a civic organization of the municipal corporation, or by the legislative authority of such municipal corporation, then such property or funds, and any park for the improvement of which in whole or in part such fund is to be used, or any property for the care or management of which, in whole or in part such fund is used, shall be managed, controlled, and administered by a board of park trustees.