CCC 1143
© Libreria Editrice Vaticana Source: vatican.va
For the purpose of assisting the work of the common priesthood of the faithful, other particular ministries also exist, not consecrated by the sacrament of Holy Orders; their functions are determined by the bishops, in accord with liturgical traditions and pastoral needs. "Servers, readers, commentators, and members of the choir also exercise a genuine liturgical function." SC 29.
Read the full chapter 2. The Sacramental Celebration of the Paschal Mystery ¶1135–1209