Congress representative Patricia Walsh submitted the first bill to declare the Clean Slate and Due Obedience Acts null and void in early 2002. The bill did not meet the quorum required for discussion at the National Congress until August 2003, after President Néstor Kirchner took office and boosted its consideration. On August 21, with a favorable vote in the National Senate, Act No. 25,779 was passed, declaring the Due Obedience and Clean Slate Acts irrevocably null and void.

On March 25, 1998, 22 years after the military coup, the National Congress passed Act No. 24,952 declaring impunity laws void. Such repeal did not have a retroactive effect. Therefore, it was necessary to move forward with the nullification of these acts to effectively reverse impunity.