(a) All actions and proceedings prior to June 6, 1961, taken in the appointment or election of members of a sanitary district board are validated. Members of these boards shall have all the powers and may perform all the duties required or permitted of them to be pursuant to this Part.
(b) All actions and proceedings prior to May 1, 1959, taken in the appointment or election of members of a sanitary district board and the appointment or election of members are validated. Members of these boards shall have all the powers and may perform all the duties required or permitted of them pursuant to the provisions of this Part.