Politics of Belgium takes place in a framework of a federal, parliamentary, representative democratic, constitutional monarchy, whereby the King of the Belgians is the Head of State and the Prime Minister of Belgium is the head of government in a multi-party system. Executive power is exercised by the government. Federal legislative power is vested in both the government and the two chambers of parliament, the Senate and the Chamber of Representatives. The federation is made up of (cultural/political) communities and (territorial) regions. Belgium's political institutions are complex; most political power is organised around the need to represent the main cultural (and political) communities. Since around 1970, the significant national Belgian political parties have split into distinct representations for each communities' interests besides defenders of their ideologies. These parties belong to three main political families, though close to the centre: the right-wing Liberals, the social conservative Christian Democrats, and Socialists forming the left-wing. Other important newer parties are the Green parties and, nowadays mainly in Flanders, the nationalist and far-right parties. Politics is influenced by lobby groups, such as trade unions and employers' organizations such as the Federation of Belgian Enterprises. Majority rule is often superseded by a de facto confederal decision making process where the minority (the French-speakers) enjoy important protections through specialty majorities (2/3 overall and majority in each of the 2 main communities).