The ordinary minister for exposition of the Eucharist is a priest or deacon. At the end of the period of adoration, before the reposition, he blesses the congregation with the [Blessed] Sacrament.
In the absence of a priest or deacon or if they are lawfully impeded, an acolyte, another special minister of Communion, or another person appointed by the local ordinary may publicly expose and later repose the Eucharist for the adoration of the faithful.
Such ministers may open the tabernacle and also, as required, place the ciborium on the altar or place the host in the monstrance. At the end of the period of adoration, they replace the Blessed Sacrament in the tabernacle. *It is not lawful, however, for them to give the blessing with the Sacrament *(HCWE 91, emphasis added).