Constituency Boundaries Generalised 20m - National Electoral Boundaries 2013 Constituency Boundaries - Generalised to 20m. The Constituencies Boundaries supplied are based on the Electoral (Amendment) (Dáil Constituencies) Act 2013 For the purpose of elections to Dáil Éireann, the country is divided into Constituencies which, under Article 16.4 of the Constitution of Ireland, have to be revised at least once every twelve years with due regard to changes in the distribution of the population. The Constituencies were last revised in 2013 and the Schedule to the Electoral (Amendment) (No 7) Act 2013 contains details of their composition. Note: These Constituency boundaries would have been called into force for the 2016 the general election which took place on Friday 26 February 2016 This dataset is provided by Tailte Éireann