The Twenty-seventh Amendment of the Constitution of Ireland provided that children born on the island of Ireland to parents who were both foreign nationals would no longer have a constitutional right to citizenship of the Republic of Ireland. It was effected by the Twenty-seventh Amendment of the Constitution Act, 2004, which was approved by referendum on 11 June 2004 and signed into law on 24 June of the same year. It partially reversed changes made to the Constitution by the Nineteenth Amendment of the Constitution of Ireland which was passed as part of the Good Friday Agreement.