The Constitution of 1920 approved the provisional constitution of 1918 in its basic features. The Czechoslovak state was conceived as a parliamentary democracy, guided primarily by the National Assembly, consisting of the Senate and the Chamber of Deputies, whose members were to be elected on the basis of universal suffrage. The National Assembly was responsible for legislative initiative and was given supervisory control over the executive and judiciary as well. Every seven years it elected the president and confirmed the cabinet appointed by him. Executive power was to be shared by the president and the cabinet; the latter, responsible to the National Assembly, was to prevail. The reality differed somewhat from this ideal, however, during the strong presidencies of Masaryk and his successor, Beneš. The constitution of 1920 provided for the central government to have a high degree of control over local government. From 1928 and 1940, Czechoslovakia was divided into the four "lands" (, ); Bohemia, Moravia-Silesia, Slovakia and Carpathian Ruthenia. Although in 1927 assemblies were provided for Bohemia, Slovakia, and Ruthenia, their jurisdiction was limited to adjusting laws and regulations of the central government to local needs. The central government appointed one third of the members of these assemblies. The constitution identified the "Czechoslovak nation" as the creator and principal constituent of the Czechoslovak state and established Czech and Slovak as official languages. The concept of the Czechoslovak nation was necessary in order to justify the establishment of Czechoslovakia towards the world, because otherwise the statistical majority of the Czechs as compared to Germans would have been rather weak, and there were more Germans in the state than Slovaks. National minorities were assured special protection; in districts where they constituted 20% of the population, members of minority groups were granted full freedom to use their language in everyday life, in schools, and in matters dealing with authorities.