Yes, there is no amnesty for human right crimes, that means those people were only protected inside Argentina. And the Nuremberg defense doesn't work against the Nuremberg laws.
On a side note, it was not exactly repealed, because you can't repeal an amnesty (ie voting a new law that removes it). They found that its creation was unconstitutional, meaning that it was void from the onset, like it had never happened. Learning about those 2 laws (+ley de pounto final for the ones giving the orders) when I was in Argentina was extremely formative on a law doctrine point of view.
On a side note, it was not exactly repealed, because you can't repeal an amnesty (ie voting a new law that removes it). They found that its creation was unconstitutional, meaning that it was void from the onset, like it had never happened. Learning about those 2 laws (+ley de pounto final for the ones giving the orders) when I was in Argentina was extremely formative on a law doctrine point of view.