Ohio Rev. Code Ann. § 5709.121
(A) Real property and tangible personal property belonging to a charitable or educational institution or to the state or a political subdivision, shall be considered as used exclusively for charitable or public purposes by such institution, the state, or political subdivision, if it meets one of the following requirements:
(1) It is used by such institution, the state, or political subdivision, or by one or more other such institutions, the state, or political subdivisions under a lease, sublease, or other contractual arrangement:
(B)
(1) Property described in division (A)(1)(a) or (b) of this section shall continue to be considered as used exclusively for charitable or public purposes even if the property is conveyed through one conveyance or a series of conveyances to an entity that is not a charitable or educational institution and is not the state or a political subdivision, provided that all of the following conditions apply with respect to that property:
(b) The property is conveyed through one conveyance or a series of conveyances to an entity that does any of the following:
(C) For purposes of this section, an institution that meets all of the following requirements is conclusively presumed to be a charitable institution: