Iran is a Guardianship of the Islamic Jurist and Islamic republic in which the president, parliament (Majles) and judicial system share powers reserved to the national government, according to its Constitution. The politics of Iran take place in a framework that officially combines elements of theocracy and presidential democracy. The December 1979 constitution, and its 1989 amendment, define the political, economic, and social order of the Islamic Republic of Iran, declaring that Shia Islam is Iran's official religion where around 90–95% of Iranians associate themselves with the Shia branch of Islam.