Ohio Rev. Code Ann. § 1109.54
(A) A state bank and its subsidiaries may engage in a covered transaction with an affiliate only if both of the following apply:
(D) Except as provided in division (E)(4) of this section, any loan or extension of credit to, or guarantee, acceptance, or letter of credit issued on behalf of, an affiliate by a state bank or its subsidiary shall be secured at the time of the transaction by collateral having a market value equal to any of the following:
(1) One hundred per cent of the amount of the loan or extension of credit, guarantee, acceptance, or letter of credit, if the collateral is composed of any of the following:
(E) For purposes of division (D) of this section: