In addition to membership in the Commonwealth, these particular countries share the following attributes:

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• Her Majesty Queen Elizabeth II as Head of State

• Use of the English language by a significant portion of the population

• Advanced levels of economic development and infrastructure

• High standards of living / GDP per person

• High levels of education and literacy

• Legal systems based on the English Common Law

• Political institutions based on the Westminster model

• Well-developed public and private institutions

• Free and fair elections and universal suffrage

• Advanced degrees of cooperation in security and defence arrangements