An authority responsible for one of the 43 areas into which England and Wales are divided for policing purposes, each coterminous with a county or group of counties. London has the Metropolitan Police Authority, and Northern Ireland has the Police Authority for Northern Ireland. Police authorities consist of local councillors, magistrates, and independent members. They are responsible for maintaining adequate and efficient forces and (except in London), subject to the Home Secretary's approval, for appointing chief constables. (The London forces have Commissioners, and the appointment of the Commissioner of Police of the Metropolis is technically by the Crown.) Police authorities, do not, however, exercise operational or managerial control, although they are responsible for ensuring that authorities comply with their statutory duties of best value.