The population of areas for which chief constables are responsible varies from a few hundred thousand to two or three million and it is commonplace for chief constables for larger force areas to be drawn from the chief constables of smaller forces. A chief constable has no senior officer. Prior to 2012, a chief constable was responsible to a police authority. The chief constable is now appointed by and accountable to the Police and Crime Commissioner of their service, who may also dismiss the chief constable.