The full text of the decree from the Apostolic Penitentiary is available HERE.
"............During the whole span of the Year of Faith, proclaimed from October 11, 2012 to the whole of November 24, 2013, all individual faithful truly repentant, duly confessed, communing sacramentally, and who pray according to the intentions of the Supreme Pontiff, will be able to acquire a Plenary Indulgence from the temporal punishment for their sins imparted by God’s mercy, applicable in suffrage to the souls of the deceased faithful.
a.- Every time they take part in at least three instances of preaching during the Sacred Missions, or at least three lessons on the Acts of Vatican Council II and on the Articles of the Catechism of the Catholic Church in any church or ideal place;
b.- Every time they visit by way of pilgrimage a Papal Basilica, a Christian catacomb, a Cathedral; Church, a sacred place designated by the Ordinary of the place for the Year of Faith (for example between the Minor Basilicas and the Shrines dedicated to the Blessed Virgin Mary, to the Holy Apostles and to Patron Saints) and take part there in some sacred function or at least pause for an apt time of recollection with pious meditations, concluding with the recitation of the Our Father, the Profession of Faith in any legitimate form, invocations to the Blessed Virgin Mary and, according to the case, to Holy Apostles or Patrons;
c.- Every time, in days determined by the Ordinary of the place for the Year of Faith (for example on the solemnities of the Lord, of the Blessed Virgin Mary, on the feast s of the Holy Apostles and Patrons, on the Chair of Saint Peter), in any sacred place they participate in a solemn Eucharistic celebration or the Liturgy of the Hours, adding the Profession of Faith in any legitimate form;
d.- A day freely chosen, during the Year of Faith, for the pious visit of the baptistery or other place, in which they received the sacrament of Baptism, renewing the baptismal promises in any legitimate formula."
The document concludes by recalling how faithful who, due to illness or other legitimate cause, are unable to leave their place of adobe, may still obtain Plenary Indulgence "if, united in spirit and thought with other faithful, and especially at the times when the words of the Supreme Pontiff and diocesan bishops are transmitted by television or radio, they recite ... the Our Father, the Profession of Faith in any legitimate form, and other prayers that concord with the objectives of the Year of Faith, offering up the suffering and discomfort of their lives".