The Most Sacred Mystery of the Eucharist (Part II)
That more perfect form of participation in the Mass whereby the faithful, after the priest's communion, receive the Lord's body from the same sacrifice, is strongly commended.
The dogmatic principles which were laid down by the Council of Trent remaining
intact [Session XXI, July 16, 1562. Doctrine on Communion under Both Species, chap. 1-3: Condlium Tridentinum. Diariorum, Actorum, Epistolarum, Tractatuum nova collectio ed. Soc. Goerresiana, tome VIII (Freiburg in Br., 1919), 698-699.], communion wider both kinds may be granted when the bishops think fit, not only to clerics and religious, but also to the laity, in cases to be determined by the Apostolic See, as, for instance, to the newly ordained in the Mass of their sacred ordination, to the newly professed in the Mass of their religious profession, and to the newly baptized in the Mass which follows their baptism.
The two parts which, in a certain sense, go to make up the Mass, namely, the liturgy of the word and the Eucharistic liturgy, are so closely connected with each other that they form but one single act of worship. Accordingly, this sacred Synod strongly urges pastors of souls that, when instructing the faithful, they insistently teach them to take their part in the entire Mass, especially on Sundays and feasts of obligation
- Constitution on the Sacred Liturgy, Sacrosanctum Concilium # 55- 56