The Ministers and Secretaries Acts 1924 to 2017 is the legislation which governs the appointment of ministers to the Government of Ireland and the allocation of functions between departments of state. It is subject in particular to the provisions of Article 28 of the Constitution of Ireland. The Acts allow for the appointment of between 7 and 15 Ministers of Government across 17 Departments, and for the appointment of up to 20 junior ministers, titled Ministers of State to assist the Ministers of Government in their powers and duties.
The principal act is the Ministers and Secretaries Act, 1924 and was one of the key statutes enacted by the Irish Free State. The Constitution of the Irish Free State in 1922 had provided for the formation of a cabinet called the Executive Council. The 1924 Act formally defined the government departments that were to exist in the Free State, created their titles and outlined their responsibilities. The Act has been amended and affected by subsequent legislation which may be cited together and construed as one Act.
From 1801 to 1922, Ireland had been governed as part of the United Kingdom. The legal government of Ireland was an executive and Privy Council of Ireland under the British Lord Lieutenant of Ireland; in practice, the Dublin Castle administration was run by the Chief Secretary for Ireland.
After the 1918 general election, MPs elected for Sinn Féin established the extrajudicial Dáil Éireann (House of Assembly) in January 1919 and made a unilateral declaration of independence of the Irish Republic. This operated without external recognition under the terms of the Dáil Constitution. Its executive, the Aireacht, was headed by the President of Dáil Éireann, who in August 1921 became the President of the Republic. In January 1922, a majority of the Dáil accepted the terms of the Anglo-Irish Treaty which agreed the terms of the independence of the Irish Free State from the United Kingdom.