Any otherwise valid sale or mortgage of real estate by an executor, administrator, guardian or conservator which was consummated before the effective date of this Act is effective and valid notwithstanding the failure of such executor, administrator, guardian or conservator to file in and have approved by the court having probate jurisdiction the special bond prescribed in Section 155 of the "Probate Act", approved July 24, 1939, as amended.
765 ILCS 80/1