_#_Independence: 1 April 1979, Islamic Republic of Iran proclaimed
_#_Constitution: 2-3 December 1979; revised 1989 to expand powers of the presidency and eliminate the prime ministership
_#_Legal system: the new Constitution codifies Islamic principles of government
_#_National holiday: Islamic Republic Day, 1 April (1979)
_#_Executive branch: cleric (faqih), president, Council of Ministers
_#_Legislative branch: unicameral Islamic Consultative Assembly (Majles-e-Shura-ye-Eslami)
_#_Judicial branch: Supreme Court
_#_Leaders:
Cleric and functional Chief of State—Leader of the Islamic
Revolution Ayatollah Ali Hoseini-KHAMENEI (since 4 June 1989);
Head of Government—President Ali Akbar HASHEMI-RAFSANJANI (since 3 August 1989);