The conclusion of the Irish War of Independence, and the subsequent signing of the Anglo-Irish Treaty, led to the creation of the Irish Free State – a dominion established for the whole island of Ireland on 6 December 1922. The border became an international frontier after the Parliament of Northern Ireland exercised its right to opt out of the Free State on 7 December 1922. The partition of 1921 created only a provisional boundary; a Boundary Commission met in 1924–25 to fix a permanent border between the two jurisdictions "in accordance with the wishes of the inhabitants, so far as may be compatible with economic and geographic conditions". The manner in which the Boundary Commission clause was drafted in the Anglo-Irish Treaty was only explicit in its ambiguity. Amongst politicians in Southern Ireland, there was remarkably little attention paid to the clause during the debates on the Treaty. The Republican activist Seán MacEntee was a "lone voice" in warning that the commission would involve an exercise "in transferring from the jurisdiction of the Government of Northern Ireland certain people and certain districts which that Government cannot govern; and by giving instead to Northern Ireland, certain other districts—unionist districts of Monaghan, Cavan and Donegal, so that not only under this Treaty are we going to partition Ireland, not only are we going to partition Ulster, but we are going to partition even the counties of Ulster."