Simplify the following text for a Grade 5 native English-speaking person.
Original: The appellation Sussex remained in use as a ceremonial county until 1974 , when the Lord-Lieutenant of Sussex was replaced with one each for East and West Sussex .
Simplified: Its area is more or less the same as that of the ancient Kingdom of Sussex . It is divided for local government into West Sussex and East Sussex and the City of Brighton and Hove .