Conditions for a Plenary Indulgence [abbreviation: CC]
1 – To perform the prescribed work, with the intention (at least habitual and general) of gaining the indulgence.
2 – Confession (even in the week preceding or following the prescribed work) and Holy Communion (on the eve of or in the week following the prescribed work).
3 – A visit, if required, to a church or public oratory; this may be made from midday on the preceding day.
4 – Pray in any manner, in accordance with the intentions of the Holy Fathers, namely:
Exaltation of the Faith;
Eradication of heresies;
Conversion of sinners
Peace amongst Christian princes
5 – Be in a state of grace.
I – Throughout the year
1 – Requiem æternam… : 300 days e.t. (each time)
2 – Pie Jesu Domine, dona eis requiem sempiternam: 300 days e.t.
3 – Matins and Lauds of the Office of the Dead: 7 years, Plenary indulgence if recited throughout a month. CC
4 – One Nocturn and Lauds of the Office of the Dead: 5 years, Plenary indulgence if recited throughout a month. CC
5 – Vespers of the Office of the Dead: 5 years.
6 – De profundis: 3 years [5 during the month of November], Plenary if recited during a month. CC
7 – Our Father, Hail Mary, Requiem: 3 years, Plenary if recited during a month. CC
8 – Miserere: 3 years, Plenary if recited during a month. CC
9 – Dies Iræ: 3 years, Plenary if recited during a month. CC
10 – Visit to a cemetery, with any prayer, even mental, for the dead: 7 years.
11 – Recitation of any prayer or devotional exercise for the dead with the intention of continuing for the following 7 or 9 days: 3 years, once a day. Plenary if performed for 7 or 9 consecutive days under the usual conditions.
II – The month of November
Any prayer or act of piety in suffrage for the dead: 3 years, once a day. Plenary if every day of the month, under the usual conditions.
III – During the Octave of All Souls’ Day
(from 2 to 9 November), Plenary Indulgence for visiting a cemetery whilst offering any prayer, even mentally, for the dead. Once a day under the usual conditions.
IV – On 2 November or the following Sunday
(i.e. during the Octave) Plenary Indulgence for visiting a church or public oratory whilst reciting 6 Our Fathers, Hail Marys and Glory Be’s. Each time.
V – For the faithful who have performed the Heroic Act of Charity for the souls in Purgatory
Plenary Indulgence, under the usual conditions:
– throughout the year for every Communion received in a church or public oratory.
– every Monday – and, if this is not possible, the following Sunday – whilst attending a Mass for the souls in Purgatory.
For priests who have performed a heroic act of charity, a privileged altar.
Notes
CC = Usual conditions | e.t. = each time
Taken from: Enchiridion indulgentiarum, Poliglotte Vaticane 1950.