The creation of an Allied Commission for Austria was envisaged by Allied leaders at the various sessions of the European Advisory Commission in 1944. The matter became more pressing following the Soviet takeover of Vienna from German control on April 13, 1945. The Soviet authorities in Vienna decided to establish a new Austrian government without prior consultation with the other Allied leaders, and on April 27, the Austrian socialist leader Karl Renner formed a government in Vienna. The British, US and French governments refused at first to recognize the Renner government, and in order to undermine the Soviet move decided to start right away with the proceedings to establish a joint commission for Austria. However, the Soviet government withheld permission for Allied representatives to enter Vienna during late April to early May, arguing that agreement on partition of Vienna into four occupation zones must be done prior to the arrival of any other troops thereto. As a result, it was only on June 4 that a delegation of US, British and French generals was able to arrive at Vienna to survey conditions in the area. However, not much progress was made throughout June, as the Soviet authorities restricted the movement of the western Allies in and around Vienna. Throughout June, negotiations for agreement on division of Austria into occupation zones were held in London within the European Advisory Commission, and the agreement was concluded on July 4, 1945, subject to further approval. The agreement was then approved by the four Allied governments. On July 12, it was approved by the British and French governments. On July 21, the Soviet government gave its approval, and the US government followed suit on July 24.