The Declaration on Masonic Associations is a declaration by the Congregation for the Doctrine of the Faith re-iterating the prohibition of Catholics from joining Masonic organizations. Its Latin title is Declaratio de associationibus massonicis. The document states that Catholics who join Masonic organizations are in a state of grave sin and may not receive Holy Communion. It was issued in 1983 by the prefect of the congregation, Joseph Cardinal Ratzinger, who became Pope Benedict XVI on April 19, 2005.