With the promulgation of the Organic Law of the National Government in October 1928, the government was reorganized into five different branches or Yuan, namely the Executive Yuan, Legislative Yuan, Judicial Yuan, Examination Yuan as well as the Control Yuan. The Chairman of the National Government was to be the head-of-state and commander-in-chief of the National Revolutionary Army. Chiang Kai-shek was appointed as the first Chairman of the National Government, a position he would retain until 1931. The Organic Law also stipulated that the Kuomintang, through its National Congress and Central Executive Committee, would exercise sovereign power during the period of political tutelage, and the KMT's Political Council would guide and superintend the National Government in the execution of important national affairs and that the council has the power to interpret or amend the organic law.