Idaho Code § 68-407
Notwithstanding the provisions of the Public Depository Law, or of any other statute of the state of Idaho to the contrary, it shall be lawful for the state of Idaho and any of its departments, institutions and agencies, municipalities, districts and political subdivisions, and for any political or public corporation of the state, and for any insurance company, savings and loan association, and for any bank, trust company or other financial institution operating under the laws of the state of Idaho, and for any executor, administrator, guardian or conservator, trustee or other fiduciary, to invest its funds or the moneys in its custody or possession eligible for investment, in any revenue bonds or warrants or general obligation bonds or general obligation refunding bonds issued by any port district of the state of Idaho.
Idaho Code § 68-407