There were two governments of the 16th Dáil, which was elected at the 1957 general election held on 5 March. The outgoing minority coalition government of Fine Gael, the Labour Party and Clann na Talmhan had failed to be returned. The 8th government of Ireland (20 March 1957 – 23 June 1959) was led by Éamon de Valera as Taoiseach, until his election as president of Ireland at the 1959 election. It lasted for 820 days from its appointment until de Valera's resignation on 17 June 1959, and continued to carry out its duties for a further 6 days until the appointment of its successor, giving a total of 826. The 9th government of Ireland (23 June 1959 – 11 November 1961) was led by Seán Lemass as Taoiseach and lasted for 873 days. Both were single-party Fianna Fáil governments.
After his appointment as Taoiseach by the president, Éamon de Valera proposed the members of the government and they were approved by the Dáil.[4] They were appointed by the president on the same day.[5]
On 17 June 1959, Éamon de Valera was elected as president of Ireland and he resigned as Taoiseach on that day.[18][19] Under Article 28.11 of the Constitution, all members of the government are deemed to have resigned on the resignation of the Taoiseach, but they continued to carry on their duties until the appointment of their successors.[20]
On 23 June 1959, in the debate on the nomination of Taoiseach, Fianna Fáil leader Seán Lemass was proposed. This motion was carried with 75 votes in favour to 51 votes against.[21] Lemass was appointed as Taoiseach by PresidentSeán T. O'Kelly.[22] It was the first time there was a change of Taoiseach within a Dáil term.
After his appointment as Taoiseach by the president, Seán Lemass proposed the members of the government and they were approved by the Dáil.[25] They were appointed by the president on 24 June 1959.[26]