Sacrosanctum Concilium §44

⁴⁴ It is desirable that the competent territorial ecclesiastical authority mentioned in Art. 22, 2, set up a liturgical commission, to be assisted by experts in liturgical science, sacred music, art and pastoral practice. So far as possible the commission should be aided by some kind of Institute for Pastoral Liturgy, consisting of persons who are eminent in these matters, and including laymen as circumstances suggest. Under the direction of the above-mentioned territorial ecclesiastical authority the commission is to regulate pastoral-liturgical action throughout the territory, and to promote studies and necessary experiments whenever there is question of adaptations to be proposed to the Apostolic See.