Ohio Rev. Code § 5816.04: Limits to transferor's authority.

To the extent conferred by the governing legacy trust instrument, a transferor to a legacy trust may have any or all of the rights, powers, and interests described in section 5816.05 of the Revised Code. A transferor shall have no rights, powers, or interests in, over, to, or regarding the corpus or income of a legacy trust unless those rights, powers, or interests are granted, permitted, or recognized by both section 5816.05 of the Revised Code and the governing legacy trust instrument. Any written, verbal, tacit, express, or implied agreement or understanding or any other agreement or understanding purporting to grant, permit, or recognize any greater rights, powers, or interests than are provided in this section or the governing legacy trust instrument is void. Any portion of a legacy trust instrument that is not voided under this section shall remain valid and effective.