The Enabling Act (German: Ermächtigungsgesetz) was a 1933 constitutional amendment that played a critical role in the rise of Adolf Hitler to become the dictator and Führer of Nazi Germany by August, 1934. It passed in the Reichstag and signed by President Paul von Hindenburg on 23 March 1933. It followed the Reichstag Fire Decree, that gave Hitler plenary power. It received its name from its legal status as an enabling act granting the Cabinet – in effect, the Chancellor – the authority to enact decrees without involving the Reichstag. The act stated that it was to last four years unless renewed by the Reichstag, which occurred twice.
http://en.wikipedia.org/wiki/Enabling_Act_of_1933