Section — Bucceroni, Institutions of Moral Theology
Octaves
¶1.
"Only doubles of the first class which have entire Octaves preserve them. But in these Octaves, excepting privileged ones, the psalms of the current feria are used. But the Octaves of doubles of the second class are celebrated only on the octave day, and indeed with simple rite." Pius X, Motu Proprio Abhinc duos annos, § II, October 23, 1913.