Austria
The Treaty of Saint-Germain of 1919 (for Hungary the Treaty of Trianon of 1920) confirmed and consolidated the new order of Central Europe which to a great extent had been established in November 1918, creating new states and altering others. The German-speaking parts of Austria which had been part of Austria-Hungary were reduced to a rump state named The Republic of German-Austria (German: "Republik Deutschösterreich"). The desire for "Anschluss" (annexation of Austria to Germany) was a popular opinion shared by all social circles in both Austria and Germany. On 12 November, German-Austria was declared a republic, and named Social Democrat Karl Renner as provisional chancellor. On the same day it drafted a provisional constitution that stated that "German-Austria is a democratic republic" (Article 1) and "German-Austria is an integral part of the German reich" (Article 2). The Treaty of Saint Germain and the Treaty of Versailles explicitly forbid union between Austria and Germany. The treaties also forced German-Austria to rename itself as "Republic of Austria" which consequently led to the first Austrian Republic.
Federal Constitutional Law (Austrian act)
In April 1945, the German Reich in the final stages of collapse and Fascism in both its German and its Austrian incarnation thoroughly discredited, Austria's pre-1933 political parties began reconstituting themselves. On April 27, leaders of the three major factions issued a Proclamation on the Independence of Austria. In Article 1, the Proclamation stated that Austria was to be rebuilt "in the spirit of the constitution of 1920."
On the same day, the parties formed a Provisional Government ("Provisorische Staatsregierung"), a committee that would act as both cabinet and legislature until constitutional structures would haven been reestablished and elections could be held.
On May 1, the Provisional Government enacted the Constitution Transition Act ("Verfassungs-Überleitungsgesetz") reestablishing the Federal Constitutional Law in its 1929 revision. The Act explicitly rescinded all constitutional law proclaimed by both the Austrofascist and the Nazi regime.