Because Cypriot nationality law extends to Cypriots in the sovereign base areas, Cypriot residents, as citizens of the Republic of Cyprus, are entitled to EU citizenship. Just under half of the population of the sovereign base areas are Cypriots, the rest are British military personnel, support staff and their dependants. In a declaration attached to the Treaty of Establishment of the Republic of Cyprus of 1960, the British government undertook not to allow new settlement of people in the sovereign base areas other than for temporary purposes.