Morocco is a constitutional monarchy with an elected parliament. The King of Morocco holds vast executive and legislative powers, including the power to dissolve the parliament. Executive power is exercised by the government but the king's decisions usually override those of the government if there is a contradiction. Legislative power is vested in both the government and the two chambers of parliament, the Assembly of Representatives and the Assembly of Councillors. The king can also issue decrees called dahirs which have the force of law.The main religion is Islam. The official language is Literary Arabic. Moroccan Arabic referred to as Dareja, Berber and French are also spoken.