Council of Trent: Session VI, Reformation, Chapter II

CHAPTER II. It is not lawful for any one who holds a benefice requiring personal residence to absent himself, save for a just cause to be approved of by the bishop, who even then shall, for the cure of souls, substitute a vicar in his stead, withdrawing a portion of the fruits.

Those inferior to bishops, who hold by title, or in commendam, any ecclesiastical benefices requiring personal residence whether by law or custom, shall be compelled, by their Ordinaries, to reside, by suitable legal remedies; as to them shall seem expedient for the good government of the churches and the advancement of the service of God, taking into account the character of the places and persons; and to no one shall any perpetual privileges, or indults, in favour of non-residence, or of receiving the fruits during absence, be of avail: temporary indulgences and dispensations, however, granted solely for true and reasonable causes, and which are to be legitimately proved before the Ordinary, shall remain in force; in which cases nevertheless, it shall be the office of bishops, as delegated in this matter by the Apostolic See, to provide that, by deputing competent vicars, and by assigning them a suitable portion of the fruits, the cure of souls be nowise neglected; no privilege or exemption whatever being of avail to any in this regard.

Translation: J. Waterworth, The Canons and Decrees of the Council of Trent (1848), Hanover Historical Texts Project transcription (1995).