Ohio Rev. Code Ann. § 135.18
(B) The following securities shall be eligible for the purposes of this section:
(G) When the public depository has deposited eligible securities described in divisions (B)(2) to (9) of this section with a trustee for safekeeping, the public depository may at any time substitute or exchange eligible securities having a current market value equal to or greater than the current market value of the securities then on deposit and for which they are to be substituted or exchanged without specific authorization of any governing board, boards, or treasurer of any such substitution or exchange only if: