Politics of Anguilla takes place in a framework of a parliamentary representative democratic dependency, whereby the Chief Minister is the head of government, and of a  multi-party system. Anguilla, the most northerly of the Leeward Islands in the Lesser Antilles, is an internally self-governing overseas territory of the United Kingdom. The United Nations Committee on Decolonization includes Anguilla on the United Nations list of Non-Self-Governing Territories. The territory's constitution is Anguilla Constitutional Order 1 April 1982 (amended 1990). Executive power is exercised by the Chief Minister and the Executive Council. Legislative power is vested in both the Executive Council and the House of Assembly. The Judiciary is independent of the executive and the legislature. Military defence is the responsibility of the United Kingdom.