Third Amendment of the Constitution Bill 1958
The Third Amendment of the Constitution Bill 1958 was a proposal to amend the Constitution of Ireland to alter the electoral system from proportional representation under the single transferable vote to first-past-the-post. The proposal was rejected in a referendum held on 17 June 1959. This was the same date as the presidential election in which Taoiseach Éamon de Valera was elected as president.
Background
Proportional representation by means of the single transferable vote had been used in Irish elections since the 1920 local elections. Under the Government of Ireland Act 1920, it was prescribed for elections to both the Southern Ireland House of Commons and the Northern Ireland House of Commons. The Constitution of the Irish Free State, adopted on independence in 1922, prescribed proportional representation for elections to Dáil Éireann. Under the Constitution of Ireland adopted in 1937, Article 16.2.5° prescribed PR-STV, while 16.2.6° specified that the number of members in a constituency would not be less than three.An amendment to the 1937 constitution must be proposed as a bill initiated in the Dáil and be passed or deemed to have been passed in both the Dáil and the Seanad, before being submitted to a referendum in which all Irish citizens on the electoral register are eligible to vote.