Ohio Rev. Code § 6121.15
All water development revenue bonds issued under this chapter are lawful investments of banks, societies for savings, savings and loan associations, deposit guarantee associations, trust companies, trustees, fiduciaries, insurance companies, including domestic for life and domestic not for life, trustees or other officers having charge of sinking and bond retirement or other special funds of political subdivisions and taxing districts of this state, the commissioners of the sinking fund of the state, the administrator of workers' compensation, the state teachers retirement system, the public employees retirement system, the school employees retirement system, and the Ohio police and fire pension fund, and are acceptable as security for the deposit of public moneys.
R.C. § 6121.15