The act introduced police areas, which would be administrative counties, county boroughs or "combined police areas", consisting of combinations of counties and county boroughs, served by a single force, overseen by an independent "police authority". The new police authorities would consist of two-thirds elected members of county or borough councils, and one-third magistrates. Under the Local Government Act 1972 the remaining borough police forces were abolished, and police authorities consisted of county councillors and magistrates in a ratio of two to one.