Under Section 2 of the 1920 Act, the Council was established with the following purpose: Under Section 7 of the 1920 Act, the Council could make orders concerning matters which were within the remit of the respective Parliaments of Southern and Northern Ireland. The Council's Orders required royal assent in the same way Bills of either of the Parliaments also required such assent.
The House of Commons of Southern Ireland was a body which although established, never functioned and never elected members to the Council; most of its members instead sat in the republican Second Dáil. In fact, the Council of Ireland never met.
Adaptation of Council under Treaty
The Anglo-Irish Treaty made provision for the continuation of the Council of Ireland after the Irish Free State was established. Under the Treaty, if Northern Ireland chose to opt out of the Irish Free State, the Council was to continue but the Council's powers could then only be applied to Northern Ireland and not to the Irish Free State. While its functions only applied to Northern Ireland, its membership continued to be 40: 20 selected by each of the Parliaments of the Irish Free State and Northern Ireland respectively and one by the King's representative. Therefore, after the Treaty, it was no longer the all-Ireland body originally envisaged as its powers applied only to Northern Ireland. Instead, it was a body in which the Irish Free State might influence the affairs of Northern Ireland and consequently was increasingly distrusted by the Government of Northern Ireland. The Council never met. On 23 January 1922 Michael Collins, then head of the Provisional Government in Dublin, met Sir James Craig, then Prime Minister of Northern Ireland, in London, and they agreed amongst other matters that: "The two Governments to endeavour to devise a more suitable system than the Council of Ireland for dealing with problems affecting all Ireland."
Abolition
After the collapse of the Irish Boundary Commission in 1925, the 1921 Treaty was amended 3 December 1925 by agreement between United Kingdom, Northern Ireland and Irish Free State governments. The Council of Ireland was essentially abolished, as it was transferred to the care of the Northern Ireland government that did not intend to work towards a united Ireland in the foreseeable future. Under Article 5 of that Agreement it was declared that: