All proceedings taken after January 1, 1969 and prior to January 1, 1972, purporting to provide for the establishment, organization, formation, and changes in the boundaries of merged areas under the provisions of chapter 260C, and not heretofore declared invalid by any court, are legalized, validated, and confirmed. The foregoing shall not be construed to affect any litigation that may be pending July 1, 1972 involving the establishment, organization, formation, or changes in the boundaries of any such merged area.