(courtesy of IFES election guide)

The monarchy is hereditary. In the Senate, 72 members are elected by popular vote via proportional representation to serve 6-year terms and 4 members are elected. In the House of Representatives 150 members are elected by universal adult suffrage to serve 3-year terms. 72 members of the Senate represent the Federal States (12 per each of the six states) and serve six-year terms, with half of these seats renewed every three years. The four remaining members of the Senate represent the two Federal Territories.