number of members to be elected at any time for each constituency and the population of each constituency, as ascertained at the last preceding census, shall, so far as possible, be identical throughout the country. The members shall be elected upon principles of Proportional Representation. The Parliament/Oireachtas shall revise the constituencies at least once in every ten years, with due regard to changes in distribution of the population, but any alterations in the constituencies shall not take effect during the life of the Chamber/Dail Eireann sitting when such revision is made.
Article 27.
At a General Election for the Chamber/Dail Eireann the polls shall be held on the same day throughout the country, and that day shall be a day not later than thirty days after the date of the dissolution and shall be proclaimed a public holiday. The Chamber/Dail Eireann shall meet within one month of such day, and shall unless earlier dissolved continue for four years from the date of its first meeting, and not longer. The Chamber/Dail Eireann may not at any time be dissolved except on the advice of the Executive Council.
Article 28.
In case of death, resignation or disqualification of a member of the Chamber/Dail Eireann, the vacancy shall be filled by election in manner to be determined by law.
