Sacrosanctum Concilium §55

⁵⁵ 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 , communion under 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.