Council of Trent: Session XXIII, Reformation, Chapter VIII

CHAPTER VIII. How, and by whom, each ought to be ordained.

Ordinations of sacred orders shall be celebrated publicly, at the time appointed by law, and in the cathedral churches, in the presence of the canons of that church, who are to be invited for that purpose; but, if they are celebrated in some other place of the diocese, in the presence of the clergy of the place; the principal church being always, as far as possible, made use of. But each one shall be ordained by his own bishop. And if any one ask to be promoted by another bishop, this shall by no means be allowed him, even under the pretext of any general or special rescript or privilege whatsoever, even at the appointed times; unless his probity and morals be recommended by the testimony of his own Ordinary; otherwise, he who ordains him shall be suspended from conferring orders during a year, and he who has been ordained shall be suspended from exercising the orders which he has received, for as long a period as shall seem expedient to his own Ordinary.

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