Ohio Rev. Code § 140.07: Lawful investments.

Obligations issued under section 133.08, 140.06, or 339.15 of the Revised Code or Section 3 of Article XVIII, Ohio Constitution, to pay costs of hospital facilities or to refund such obligations are lawful investments for entities enumerated in division (A)(1) of section 133.03 of the Revised Code, and are eligible as security for the repayment of the deposit of public moneys.