18 years of age; universal
Executive branch:
chief of state: President Ahmed Abdallah SAMBI (since 26 May 2006)
head of government: President Ahmed Abdallah SAMBI (since 26 May 2006)
cabinet: Council of Ministers appointed by the president
elections: as defined by the 2001 constitution, the presidency rotates every four years among the elected presidents from the three main islands in the Union; election last held 14 May 2006 (next to be held in 2011)
election results: Ahmed Abdallah SAMBI elected president; percent of vote - Ahmed Abdallah SAMBI 58.0%, Ibrahim HALIDI 28.3%, Mohamed DJAANFAMI 13.7%
Legislative branch:
unicameral Assembly of the Union (33 seats; 15 deputies are selected by the individual islands' local assemblies and 18 by universal suffrage; to serve for five years);
elections: last held 18 and 25 April 2004 (next to be held on 2 August 2009)