II.27. (26.) The imposition of hands or confirmation.
(1) Because after baptism the Holy Spirit is given through the bishops with the imposition of hands, we remember that the apostles had done this in the Acts of the Apostles. [...] Let me add, however, by whom this is done most especially, as holy Pope Innocent wrote. He stated that it is permitted to be done by a bishop and not by any other. For presbyters, although they are priests, nevertheless do not have the summit of the episcopacy. (4) It is obligatory that only bishops do the sealing and hand on the Holy Spirit. Not only does ecclesiastical custom demonstrate this, but so also the above-cited reading from the Acts of the Apostles, which asserts that Peter and John were those who were directed to hand on the Holy Spirit to the already baptized. Although it is permitted to priests either without a bishop, or with a bishop present, to anoint the baptized with chrism when they baptize, they may do so only with chrism that has been consecrated by the bishop. Nevertheless, they are not to sign the forehead with that oil, because that ought to be done only by bishops when they hand on the Holy Spirit.
(trans. Knoebel 2008: 112-113)