All actions and proceedings prior to April 1, 1979, taken, and all elections held in a sanitary district or in a district purporting to be a legal sanitary district by virtue of the purported authority and acts of a county board of commissioners, State Board of Health, Commission, or any other board, officer or agency for the purpose of authorizing, selling or issuing the bonds of the sanitary district, and all bonds at any time issued by or on behalf of a sanitary district, are in all respects validated. These bonds are declared to be the legal and binding obligations of the sanitary district. (1953, c. 596, s. 3; 1957, c. 1357, s. 1; 1979, 2nd Sess., c. 1079, s. 2; 1983, c. 891, s. 2.)