the purposes of the election, in accordance with the second paragraph of section fifteen of this Constitution, of a successor to a senator chosen by the people of a State, before the commencement of this section, for a term expiring after that commencement but whose place became vacant before that commencement, that senator shall be deemed to have been elected for a term expiring at the time when his term would have expired by virtue of sub-section (6.) of this section if his place had not become vacant. Section 15 If the place of a senator becomes vacant before the expiration of his term of service, the Houses of Parliament of the State for which he was chosen shall, sitting and voting together, choose a person to hold the place until the expiration of the term, or until the election of a successor as hereinafter provided, whichever first happens until the next expiry or dissolution of the House of Representatives. But if the Houses of Parliament of the State are not in session at the time when the vacancy is notified, the Governor of the State, with the advice of the Executive Council thereof, may appoint a person to hold the place until the expiration of fourteen days after the beginning of the next session of the Parliament of the State, or until the election of a successor until the next expiry or dissolution of the House of Representatives, whichever first happens. At the next general election of members of the House of Representatives, or at the next election of senators for the State, whichever first happens, a successor shall, if the term has not then expired, be chosen to hold the place from the date of his election until the expiration of the term. Discussion For a referendum to approve an amendment of the constitution, it must ordinarily achieve a double majority: approved by a majority of states (i.e., four of the six states) as well as a majority of those voting nationwide. This was the fourth of five referendums () to achieve an overall majority, but fail the requirement of a majority of states. It had the highest percentage approval of any unsuccessful referendum and the margin of failure in the fourth state, Western Australia, was 9,211 votes (1.53%). Charles Court the Liberal Premier of Western Australia, Joh Bjelke-Petersen the National Party Premier of Queensland and Max Bingham