Type: Republic; unification (of former south and north Yemen): May 22, 1990. Constitution: Adopted May 21, 1990 and ratified May 1991. Branches: administrator--Prime Minister with Cabinet. Legislative--bicameral legislature with 111-seat Shura Council and 301-seat House of Representatives. Judicial--the constitution calls for an independent judiciary. The former northern and southern legal codes have been unified. The legal system includes separate commercial courts and a Supreme Court based in Sanaa. Administrative subdivisions: 18 governorates subseparated into districts. Political parties: General People's Congress (GPC), Yemeni Grouping for Reform (Islaah), Yemeni Socialist Party (YSP), Baathist parties, Nasserist parties, and Muslim fundamentalist parties. vote: Universal over 18. National holiday: May 22 (Unity Day).