In August 1949, Hatta headed a delegation to the Hague for a Round Table conference. In November 1949, the formation of the United States of Indonesia was finally agreed. It was to be a federation consisting of the Republic and 15 States which the Dutch had created during the National Revolution. The Queen of the Netherlands would continue to become the symbolic head of state while Sukarno and Hatta would continue as president and vice president. On 27 December 1949, the Dutch authorities finally recognized Indonesian sovereignty.