Lebanon is a semi-presidential parliamentary democratic republic within the overall framework of confessionalism, a form of consociationalism in which the highest offices are proportionately reserved for representatives from certain religious communities. The constitution grants the people the right to change their government. However, from the mid-1970s until the parliamentary elections in 1992, civil war precluded the exercise of political rights. According to the constitution, direct elections must be held for the parliament every 4 years. The last parliamentary election was in 2009. The Parliament, in turn, elects a President every 6 years to a single term. The President is not eligible for re-election. The last presidential election was in 2016. The president and parliament choose the Prime Minister. Political parties may be formed; most are based on sectarian interests. 2008 saw a new twist to Lebanese politics when the Doha Agreement set a new trend where the opposition is allowed a veto power in the Lebanese Council of Ministers and confirmed religious Confessionalism in the distribution of political power. The Economist Intelligence Unit classified Lebanon as a "hybrid regime" in 2016.
Since the emergence of the post-1943 state and after the destruction of the Ottoman Caliphate, national policy has been determined largely by a relatively restricted group of traditional regional and sectarian leaders. The 1943 National Pact, an unwritten agreement that established the political foundations of modern Lebanon, allocated political power on an essentially confessional system based on the 1932 census. Seats in parliament were divided on a 6-to-5 ratio of Christians to Muslims, until 1990 when the ratio changed to half and half. Positions in the government bureaucracy are allocated on a similar basis. The pact also by custom allocated public offices along religious lines, with the top three positions in the ruling "troika" distributed as follows: