I read up a bit and found that as a member of the Rosary Confarternity, one gains a plenary indulgence on the following days: day of enrollment in the Confraternity, Christmas, Easter, Annunciation, Purification, Assumption, Our Lady of the Rosary, and Immaculate Conception.
Confraternity members must pray one whole rosary (15 Mysteries, at least) a week. A special rosary on a particular day of indulgence is neither referenced nor implied.
To answer your question, you should pray the rosary as you usually do, throughout the week, and meet the “usual conditions,” that is:
—have the intention to receive the indulgence
—have sacramentally confessed one’s sins (within an eight day period before or after day of indulgence)
—receive the Holy Eucharist (within an eight day period before or after day of indulgence);
—pray for the intentions of the Holy Father (6 Paters and 6 Aves)
—perform the prescribed action of the indulgence
—have the interior disposition of complete detachment from sin, even venial sin.
Sources:
A. From the Confraternity Site
1.For members of the Rosary Confraternity, a plenary indulgence, under the usual conditions, is granted:
a.on the day of enrollment. (When application is made, a certificate of membership is sent, indicating the day of the enrollment.)
b.on the following feast days: Christmas, Easter, Annunciation, Purification, Assumption, Our Lady of the Rosary, and Immaculate Conception.
2.For those who pray the Rosary, a plenary indulgence is granted under the usual conditions, when the Rosary is prayed in Church, or in a Public Oratory, in a family (family Rosary), Religious Community, or Pious Association. Otherwise a partial indulgence is granted.
B. Various Sources
An indulgence is defined in the Code of Canon Law (can. 992) and in the Catechism of the Catholic Church (n. 1471) as: "a remission before God of the temporal punishment due to sins whose guilt has already been forgiven, which the faithful Christian who is duly disposed gains under certain prescribed conditions through the action of the Church which, as the minister of redemption, dispenses and applies with authority the treasury of the satisfactions of Christ and the saints.”
A plenary indulgence can be gained only once a day. In order to obtain it, the faithful must, in addition to being in the state of grace and performing the indulgenced act:
—have the intention to receive the indulgence
—have sacramentally confessed one’s sins
—receive the Holy Eucharist (it is certainly better to receive it while participating in Holy Mass, but for the indulgence only Holy Communion is required);
—pray for the intentions of the Supreme Pontiff (6 Paters and 6 Aves)
—perform the prescribed action of the indulgence
—have the interior disposition of complete detachment from sin, even venial sin;
The reception of the Sacraments was limited to 8 days before or after doing the prescribed work (counting the day of the work). However, in the Great Jubilee Year 2000, the Apostolic Penitentiary relaxed this norm to “several days (about 20) before or after the indulgenced act” (Gift of the Indulgence, General remarks, 5).
The Apostolic Penitentiary affirms that this norm of “about 20 days” remains in effect, since it was contained under the “General remarks on indulgences,” and not under those specific to the Jubilee Indulgence. [N.B. The grants of indulgence are contained in the Enchiridion Indulgentiarum (4th ed., 1999), in special grants of the Holy See, such as for the Year of the Holy Eucharist, and in special grants which bishops may establish for their dioceses.]
Therefore, it is appropriate, but not necessary, that the sacramental Confession and especially Holy Communion and the prayer for the Pope’s intentions take place on the same day that the indulgenced work is performed; but it is sufficient that these sacred rites and prayers be carried out within several days (about 20) before or after the indulgenced act.
Prayer for the Pope’s intentions is left to the choice of the faithful, but an “Our Father” and a “Hail Mary” are suggested. One sacramental Confession suffices for several plenary indulgences, but a separate Holy Communion and a separate prayer for the Holy Father’s intentions are required for each plenary indulgence.
For the sake of those legitimately impeded, confessors can commute both the work prescribed and the conditions required (except, obviously, detachment from even venial sin).
Indulgences can always be applied either to oneself or to the souls of the deceased, but they cannot be applied to other persons living on earth.
Let me know if any of this helps!
