Amendments to the Constitution of Ireland

An amendment may be made to any part of the Constitution of Ireland but only by referendum. An amendment must first be approved by both Houses of the Oireachtas (parliament), then submitted to a referendum, and finally signed into law by the President.

Aside from constitutional referendums, the constitution also provides for a referendum on an ordinary bill, known as the ordinary referendum, but there has not been one so far.

Ireland had two previous Constitutions, prior to the adoption of the Constitution of Ireland: the Dáil Constitution of the short-lived 1919–1922 Irish Republic, and the constitution of the 1922–1937 Irish Free State.

The Dáil Constitution was enacted by Dáil Éireann (which was at that time a single chamber assembly). It was not amended.

The Constitution of the Irish Free State was adopted in October 1922 and came in force on 6 December 1922. It originally provided for a process of amendment by means of a referendum. However the constitution could initially be amended by the Oireachtas for eight years. The Oireachtas chose to extend that period, meaning that for the duration of its existence, the Free State constitution could be amended at will by parliament. By virtue of the 1922 Constitution Act, the constitution could not be amended in a way with conflicted with the Anglo-Irish Treaty of 1921 ratified by both the United Kingdom and the Irish Republic. However the Statute of Westminster removed that restriction in 1931 as far as British (but not Irish) law was concerned. It was amended 24 times between 1925 and 1936.

The procedure for amending the constitution is specified in Article 46. A proposed amendment must take the form of a bill to amend the constitution originating in Dáil Éireann (lower house of the Oireachtas). It must first be formally approved by both the Dáil and the Senate, though in practice the Senate has only the power to delay an amendment adopted by the Dáil.

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