Commutation of the Work
Commutation: Confessors (i.e. any priest with faculties to hear confessor) can commute, on behalf of those legitimately impeded, both the work prescribed and the conditions required. This can be done inside or outside of confession. The general norm of commutation is that it be into some moral equivalent of the prescribed work or conditions, but which are within the capacity of the one benefiting from the commutation.
Religious, the
Infirm and the
Cloistered men and women religious, the infirm, and those who are unable to leave their house, can carry out, in lieu of a visit to a certain church:
  1. a visit to a chapel of their house (convent, monastery, hospital, prison etc.), or, 
  2. if this is impossible, spiritually unite themselves with those carrying out a prescribed work, offering their prayers, sufferings and discomforts to God

Thus, even a person who is unable to leave their bed or their room can gain the Jubilee Indulgence by spiritually uniting themselves to those who are carrying our a work, such as a pilgrimage to the Holy Places, offering as their own work their prayers and infirmities.  

The following conditions must be fulfilled whenever we seek to gain a Plenary Indulgence (complete remission of the temporal punishment due to sin). These general conditions are in addition to the specific conditions of the indulgenced work (e.g. a pilgrimage).
  1. Be Baptized and not excommunicated from the Catholic Church
  2. A subject of the one granting the indulgence. (Since it is the Pope granting the Jubilee Indulgence all Catholics of any Rite meet this condition.)
  3. Be in the State of Grace, at least at the end of doing the indulgenced work.
  4. Have at least a General Intention to gain the indulgence. (This can be fulfilled by making a general intention at the beginning of the day to gain the indulgences for which one is eligible that day, or, by making a specific intention at the time of doing the indulgenced work.)
  5. Do the Prescribed Work. (This is the pilgrimage, charity, penitence, etc., and any conditions associated the specific indulgenced work.)
  6. Sacramental Confession, several days before or after the indulgenced work. In a Feb. 2000 document on Indulgences the Apostolic Penitentiary stated that the allowable time should be considered to be "about 20 days." One confession suffices for several plenary indulgences. 
  7. Communion, several days before or after (to "about 20 days"), but is most fittingly received on the day that the work is done. A unique Communion is necessary for each plenary indulgence.
  8. Prayers for the Intentions of the Pope (such as an Our Father and Hail Mary, though no particular prayer is prescribed). These prayers may be made several days before or after, but are most fittingly made on the day the work is done.
  9. Detachment from all sin, even venial sin. Incomplete detachment from sin would result in the receipt of only a partial indulgence for that work. It is this disposition to renounce all attachment to our sins which opens our heart to the receipt of the full remission of the temporal guilt of sin, which God  desires to grant us through the Church.