Apostolic blessing

[4] At a general audience, when the blessing immediately follows the singing of the Pater Noster, it is naturally given without "Dominus vobiscum".

[5] Within his own diocese, a bishop may impart the apostolic blessing three times a year on solemn feasts.

The same holds, within their territories, for non-bishop prelates (such as an apostolic prefect) recognized by canon law as juridically equivalent to diocesan bishops.

[8] A plenary indulgence is granted to those who devoutly receive the papal blessing when imparted by the pope himself in the Urbi et Orbi form or by their own bishop in accordance with this authorization.

[13] Priests are urged to impart it to the dying, but if a priest cannot be had, the Church grants a plenary indulgence, to be acquired at the moment of death, to any rightly disposed Christian who in life was accustomed to say some prayers, with the Church itself supplying the four conditions normally required for gaining a plenary indulgence (recent Sacramental Confession, reception of Holy Communion, prayers for the pope's intentions, and detachment from all sin).

Apostolic blessing parchment
Pope Benedict XVI – in a General Audience