Members of the choir exercise a genuine liturgical function. They ought to discharge their office, therefore, with the sincere devotion and decorum demanded by so exalted a ministry and rightly expected of them by God's people.

Consequently, they must all be deeply imbued with the spirit of the liturgy, in the measure proper to each one, and they must be trained to perform their functions in a correct and orderly manner.

Constitution on the Sacred Liturgy, 29