18 years of age; universal
Executive branch:
chief of state: President Umaru Musa YAR'ADUA (since 29 May 2007); note - the president is both the chief of state and head of government
head of government: President Umaru Musa YAR'ADUA (since 29 May 2007)
cabinet: Federal Executive Council
elections: president is elected by popular vote for a four-year term (eligible for a second term); election last held 21 April 2007 (next to be held in April 2011)
election results: Umaru Musa YAR'ADUA elected president; percent of vote - Umaru Musa YAR'ADUA 69.8%, Muhammadu BUHARI 18.7%, Atiku ABUBAKAR 7.5%, Orji Uzor KALU 1.7%, other 2.3%
Legislative branch:
bicameral National Assembly consists of the Senate (109 seats, 3 from each state plus 1 from Abuja; members elected by popular vote to serve four-year terms) and House of Representatives (360 seats; members elected by popular vote to serve four-year terms)
elections: Senate - last held 21 April 2007 (next to be held in April 2011); House of Representatives - last held 21 April 2007 (next to be held in April 2011)