Administratively, the UAE is a loose federation of seven emirates, each with its own ruler. The pace at which local government in each emirate evolves from traditional to modern is set primarily by the ruler. Under the provisional constitution of 1971, each emirate reserves considerable powers, including control over mineral rights (notably oil) and revenues. In this milieu, federal powers have developed slowly. The constitution established the positions of president (chief of state) and vice president, each serving 5-year terms; a Council of Ministers (cabinet), led by a prime minister (head of government); a supreme council of rulers; and a 40-member National Assembly, a consultative body whose members are appointed by the emirate rulers. President Shaikh Zayyed bin Sultan Al Nahyyan has been president of the UAE since it was founded.