Catechism of the Catholic Church §2498 — excerpt
"Civil authorities have particular responsibilities in this field because of the common good.... It is for the civil authority ... to defend and safeguard a true and just freedom of information."
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.
Also cites: IM 12 · IM 12 # 2