Humberside was abolished in 1996 both as a county council and a ceremonial county, but the name Humberside continues to be used unofficially in subsequent boundary reviews as presented by the Boundary Commission for England to describe the area covered by the former county for the purpose of the rules which strongly deter cross-council constituencies (spanning more than one local authority within its area). The area covers the four unitary authorities of East Riding of Yorkshire, Hull, North Lincolnshire and North East Lincolnshire The constituency boundaries used up to the 2005 United Kingdom general election were drawn up when it was a county. The area is divided into 10 parliamentary constituencies – 4 borough constituencies and 6 county constituencies.