Altar Servers assist the presider at liturgy. They may be boys or girls no younger than 3rd grade, teens or adults. All servers need to be able to receive Holy Communion and be willing to attend any training sessions. Servers should arrive 15 minutes before Mass. Servers should know and be willing to recite responses at Mass. Just as with adult liturgical ministers, school-age servers need to be responsible about showing up for their assigned Masses. In cases where they are unable to be present, they are expected to provide their own substitute. Altar Servers are scheduled according to the needs or preferences of the individual Server as well as according to the needs of the parish.