A plenary indulgence, applicable only to the Souls in Purgatory, is granted to the faithful, who on the day dedicated to the Commemoration of all the faithful departed, piously visit a church, a public oratory or -- for those entitled to use it -- a semipublic oratory.
The above indulgence can be acquired either on the day designated above or, with the consent of the Ordinary, on the preceding or following Sunday or the feast of All Saints.
The above indulgence is contained in the Apostolic Constitution The Doctrine of Indulgences, Norm 15, with account being taken of proposals made to the Sacred Penitentiary in the meantime.
In visiting the church or oratory, it is required, according to Norm 16 of the same Apostolic Constitution, that "one Our Father and the Creed be recited." [ed. note : see Norm25 of the Enchiridion].