The Nineteenth Amendment of the Constitution is an amendment of the Constitution of Ireland which permitted the state to be bound by the British–Irish Agreement (the bilateral portion of the Good Friday Agreement) and enabled the establishment of shared political institutions between Ireland and Northern Ireland. It also provided a mechanism for a further amendment to the Constitution upon a declaration by the government on the implementation of the Agreement, most notably by changing Articles 2 and 3 from the previous claim over the whole island of Ireland to an aspiration towards creating a united Ireland by peaceful means, "with the consent of a majority of the people, democratically expressed, in both jurisdictions in the island".