Chapter X: On the Denunciation of Bad Books

27. Although it belongs to all Catholics, especially to those who excel in doctrine, to denounce pernicious books to Bishops or to the Apostolic See, nevertheless by a special title this pertains to Nuncios, Apostolic Delegates, Ordinaries of places, and Rectors of Universities flourishing in praise of doctrine.

28. It is expedient that in the denunciation of bad books not only the title of the book be indicated, but also, insofar as it can be done, the causes be set forth on account of which the book is judged worthy of censure. But to those to whom the denunciation is referred, it will be sacred to preserve secret the names of those denouncing.

29. Ordinaries, also as Delegates of the Apostolic See, should strive to proscribe and take from the hands of the faithful books and other harmful writings published or diffused in their diocese. Let them refer to apostolic judgment those works or writings which demand a subtler examination, or in which, for pursuing a salutary effect, the sentence of supreme authority seems to be required.