In the Roman Catholic Church a priest or bishop blesses the faithful with the Blessed Sacrament in the monstrance during Benediction of the Blessed Sacrament. According to the guidelines given by the Vatican's Congregation for the Discipline of the Sacraments that govern the procedures for liturgical ceremonies, if a Roman Catholic layperson (a lay acolyte or parish administrator, for example) or any non-ordained religious (who is not the superior of the congregation) leads a Sunday service (other than a Mass, which requires a priest to celebrate), such as Eucharistic adoration, the Rosary, or celebration of the Liturgy of the Hours, he or she does not perform rites or sacraments reserved to the clergy and does not solemnly bless the people as a bishop, priest, or deacon would at the end of the service; an alternative format is used instead.