Claim: Austria signed the Austrian State Treaty.

The Austrian State Treaty -LRB- German : -RRB- or Austrian Independence Treaty re-established Austria as a sovereign state . It was signed on 15 May 1955 in Vienna , at the Schloss Belvedere among the Allied occupying powers -LRB- France , the United Kingdom , the United States , and the Soviet Union -RRB- and the Austrian government . It officially came into force on 27 July 1955 .   Its full title is `` Treaty for the re-establishment of an independent and democratic Austria , signed in Vienna on the 15 May 1955 '' -LRB- Staatsvertrag betreffend die Wiederherstellung eines unabhängigen und demokratischen Österreich , unterzeichnet in Wien am 15 . Mai -RRB- .