The criteria for membership in the Commonwealth of Nations, which apply to current and prospective member states, have been altered by a series of documents issued over the past eighty-two years. The most important of these documents were the Statute of Westminster (1931), the London Declaration (1949), the Singapore Declaration (1971), the Harare Declaration (1991), the Millbrook Commonwealth Action Programme (1995), the Edinburgh Declaration (1997), and the Kampala Communiqué (2007). New member states of the Commonwealth must abide by certain criteria that arose from these documents, the most important of which are the Harare principles and the Edinburgh criteria. The Harare principles require all member states of the Commonwealth, old and new, to abide by certain political principles, including democracy and respect for human rights. These can be enforced upon current members, who may be suspended or expelled for failure to abide by them. To date, Fiji, Nigeria, Pakistan, and Zimbabwe have been suspended on these grounds; Zimbabwe later withdrew. The foremost of the Edinburgh criteria requires new member states to have either constitutional or administrative ties to at least one current member state of the Commonwealth of Nations. Traditionally, new Commonwealth member states had ties to the United Kingdom. The Edinburgh criteria arose from the 1995 accession of Mozambique, at the time the only member state that was never part of the British Empire (in whole or part). The Edinburgh criteria have been reviewed, and were revised at the 2007 Commonwealth Heads of Government Meeting, allowing the admission of Rwanda at the 2009 Meeting. History Founding documents The formation of the Commonwealth of Nations is dated back to the Statute of Westminster, an Act of the British Parliament passed on 11 December 1931. The Statute established the independence of the Dominions, creating a group of equal members where, previously, there was one (the United Kingdom) paramount. The solitary condition of membership of the embryonic Commonwealth was that a state be a Dominion. Thus, the independence of Pakistan (1947), India (1947), and the Dominion of Ceylon (now Sri Lanka) (1948) saw the three countries join the Commonwealth as independent states that retained the King as head of state. On the other hand, Burma (1948) and Israel (1948) did not join the Commonwealth, as they chose to become republics. In 1949, the Commonwealth chose to regard Ireland as no longer being a member when Ireland repealed the External Relations Act under