Executive authority in Saint Helena is invested in Queen Elizabeth II and is exercised on her behalf by the Governor of Saint Helena. The Governor is appointed by the Queen on the advice of the British Government. Defence and Foreign Affairs remain the responsibility of the United Kingdom. There are fifteen seats in the Legislative Council, a unicameral legislature. Twelve of the fifteen members are elected in elections held every four years. The other three members are the Governor and two ex officio officers. The Executive Council consists of the Governor, two ex officio officers, and six elected members of the Legislative Council appointed by the Governor. There is no elected Chief Minister, and the Governor acts as the head of government. The current Governor, since November 2007, is Andrew Gurr, who succeeded Michael Clancy. Both Ascension Island and Tristan da Cunha have an Administrator appointed to represent the Governor of Saint Helena.