Ohio Rev. Code Ann. § 1745.42
(A) Unless otherwise provided in the governing principles, the following apply:
(1) No contract, action, or transaction is void or voidable with respect to an unincorporated nonprofit association because the contract, action, or transaction is between or affects the association and one or more of its members, managers, or officers or is between or affects the association and any other person in which one or more of the association's members, managers, or officers are members, managers, or officers or in which one or more of the association's members, managers, or officers have a financial or personal interest, or because one or more interested members, managers, or officers participate in or vote at the meeting of the members, the managers, or a committee of the managers that authorizes the contract, action, or transaction, if any of the following applies: