Savings and time deposit certificates of a state bank or a national bank doing business in this State but, unless otherwise authorized by a court of competent jurisdiction, only to the extent that such deposits are insured by the United States or any agency thereof, even though the bank of deposit is the representative of the ward's estate. Amounts deposited in savings and time deposit certificates of such bank in excess of the amount insured by the United States or any agency thereof shall be secured by a surety bond taken from a surety authorized to transact business in this State in such sum, under such conditions and with such security sufficient to save the estate from loss.
755 ILCS 5/21-2.06