Each ward elects an alderman to the Court of Aldermen, and commoners (the City equivalent of a councillor) to the Court of Common Council of the Corporation. Only electors who are Freemen of the City of London are eligible to stand. The number of commoners a ward sends to the Common Council varies from two to ten, depending on the number of electors in each ward. Since the 2003 review it has been agreed that the four more residential wards: Portsoken, Queenhithe, Aldersgate and Cripplegate together elect 20 of the 100 commoners, whereas the business-dominated remainder elect the remaining 80 commoners. 2003 and 2013 boundary changes have increased the residential emphasis of the mentioned four wards.