Republican Sinn Féin maintains that Ireland should remain independent of large power blocks and thus is a Eurosceptic party. The people who would go on to found RSF, while they were still members of Provisional Sinn Féin in 1972 opposed Ireland being brought into the European Economic Community, which later became the European Union. RSF in any case does not recognise the Single European Act, Maastricht Treaty, Amsterdam Treaty, Treaty of Nice and Treaty of Lisbon as it applies to Ireland, because these agreements were ratified by what it sees as completely "illegitimate" regimes at Leinster House in Dublin and (for the north) Westminster Palace in London.