99. In fact, the necessity remains for establishing commissions dealing with the Sacred Liturgy as well as sacred art and sacred music according to the norm of law in each diocese and territory of the Conference of Bishops.[Cf. Mediator Dei, 1947 : AAS 39 (1947) 561-562 ; SC 44-46; Sacram Liturgiam: (1964) 141; Inter Oecumenici, 44-46.] These commissions shall work in their own right for the purposes proper to them, and shall not cede the matters entrusted to them to any “mixed” commission.
Does your diocese have each of them? Note their prescription has been on the books for two-thirds of a century.