which by a special Apostolic indult may be used in the celebration of Mass in mission territories, in place of an altar- stone or portable altar
(Approved by the Congregation of Sacred Rites, March 12, 1947)
*Reserved to a bishop but may be delegated to a priest.
The bishop (or a priest delegated for this), having ascertained the authenticity of the relics of holy martyrs to be used here, encloses them in a tiny sack which is sewn in the right corner of the antimension. Then he blesses the antimension, saying:
P: Our help is in the name of the Lord.
All: Who made heaven and earth.
P: The Lord be with you.
All: May He also be with you.
Let us pray.
Lord, we humbly appeal to your sovereignty, asking that it please you to bless this antimension, made ready by our lowly ministry to receive the offerings of your people. For on it we are to offer the holy Sacrifice to you, to the honor of the blessed Virgin Mary and all the saints, and in particular to the honor of Saints N. and N., whose relics we have enclosed therein. Grant that by these sacred mysteries the bonds of our sins be loosed, our stains blotted out, pardon obtained and graces acquired, so that together with your holy elect we may merit the joys of everlasting life through Christ our Lord.
He sprinkles it with holy water.