The treaty allowed Northern Ireland, which had been created by the Government of Ireland Act 1920, to opt out of the Free State if it wished, which it duly did on 8 December 1922 under the procedures laid down. As agreed, an Irish Boundary Commission was then created to decide on the precise location of the border of the Free State and Northern Ireland. The republican negotiators understood that the commission would redraw the border according to local nationalist or unionist majorities. Since the 1920 local elections in Ireland had resulted in outright nationalist majorities in County Fermanagh, County Tyrone, the City of Derry and in many District Electoral Divisions of County Armagh and County Londonderry (all north and west of the "interim" border), this might well have left Northern Ireland unviable. However, the Commission chose to leave the border unchanged; as a trade-off, the money owed to Britain by the Free State under the Treaty was not demanded.