The Taoiseach is the head of the Government of Ireland. Under Article 13 of the Constitution of Ireland, the Taoiseach is appointed by the President of Ireland on the nomination of Dáil Éireann, the lower house of the Oireachtas. The Taoiseach must be a member of Dáil Éireann.
After a general election or the resignation or death of a Taoiseach, members of the Dáil are proposed and seconded for the nomination of the Dáil to the position of Taoiseach. They are voted on in the order in which they are proposed. The candidate reaching a majority of votes cast wins the nomination, and is formally appointed as Taoiseach by the President in Áras an Uachtaráin. Before 2016, all successful candidates obtained the votes of 50% or more of the house, but following the 2016 election, Enda Kenny was elected with the votes of just over one-third of TDs after Fianna Fáil abstained as part of a confidence and supply arrangement. Since 2016, it has been possible to formally register an abstention in Dáil votes. The Ceann Comhairle casts a vote only in the case of a tie.