Constitution of Australia
Part III of Chapter 1 is about the House of Representatives. Section 24 says the House must have twice as many members as the Senate, each elected by a single electorate. This is called the 'Nexus'. It designed to prevent swamping of the senate's power in the case of a joint sitting (see Section 57 below). The number of electorates in a State is to be based on its share of the national population.