There is no legislature as such.
The Cabinet of 15 members plus a prime minister, all appointed by the emir, run the government. The Consultative Council of 30 members, appointed by the emir, advises him on laws proposed by the Cabinet.
1783-1796 Ahmad bin Khalifa
1796-1825 *Salman I
1869-1935 *Isa I
1942-1961 Salman II
1961-1999 Isa II Salman al-Khalifa
1999 now Hamad Bin Essa Al-Khalifa
2002 now Sheikh Hamad ibn `Isa Al Khalifah
1971 now Khalifa bin Salman al-Kalifa