A local authority whose area is a district. A district council has certain exclusive responsibilities (e.g. housing and local planning) and shares others (e.g. recreation, town and country planning) with the council of the county to which the district belongs. Some responsibilities (e.g. education and the personal social services) belong to the district council if the district is metropolitan, but to the county council if it is not. If a district has the style of borough, its council is called a borough council and its chairman the mayor. In the 1990s the Local Government Commission for England carried out a review of local authorities with a view to establishing unitary (single-tier) authorities. This led to wider powers for district councils and to some amalgamations and boundary revision.