In local government in the Republic of Ireland, the chief executive of a city or county is the senior permanent official of its local authority. Whereas the county council and city council are elected officials who formulate policy, the chief executive is an appointed official who manages the implementation of policy. The position was introduced in 1929–42 based on the American council–manager government model, and until 2014 the chief executive was styled the county manager or city manager. Their salaries range from €132,511 to €189,301 per annum. The County and City Management Association (formerly the County and City Managers' Association) is the professional association for chief executives, and it is affiliated to the International City/County Management Association (ICMA).