The Government of Westland takes place within the framework of a Single Party Unitary Parliamentary Republic, and the Constitution of 1923 asserts the role of the Socialist Party as being central in Westlandic government and politics. Only the Socialist Party, and other political parties and organisations which are officially affiliated or endorsed by the Socialist Party may contest elections, these include the trade unionist parties, and worker parties. Free and fair elections for the unicameral National Assembly occur every five years. The office of Chancellor, and Socialist Party Secretary are appointed by the senior appointments committee of the National Assembly.