387. The Diocesan Bishop, who is to be regarded as the High Priest of his flock, from whom the life in Christ of his faithful in some sense derives and upon whom it depends,[Cf. Sacrosanctum Concilium 41] must promote, regulate, and be vigilant over the liturgical life in his diocese. It is to him that in this Instruction is entrusted the regulating of the discipline of concelebration (cf. nos. 202, 374) and the establishing of norms regarding the function of serving the Priest at the altar (cf. no. 107), the distribution of Holy Communion under both kinds (cf. no. 283), and the construction and ordering of churches (cf. no. 291). It is above all for him, moreover, to nourish the spirit of the Sacred Liturgy in the Priests, Deacons, and faithful.
Note the regulation on Communion from the Cup. Nobody was really disputing than bishops can do this. Aside from the entrusting, some decisions just don’t seem all that sensible.