Catechism of the Catholic Church §1571 — excerpt
Since the Second Vatican Council the Latin Church has restored the diaconate "as a proper and permanent rank of the hierarchy," while the Churches of the East had always maintained it.
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: LG 29 # 2 · AG 16 # 6
