The canon does not specify how the allegedly Priscillianist custom distinguished the presbyterial and episcopal liturgical greetings. The mention of the Eastern practice seems erroneous, because the Eastern liturgies (except those of Egypt) generally adopted the greeting "Peace to all" (εἰρήνη πᾶσι) since the 4th century. The restrictive Spanish custom did not prevail in the West where the rule established that the bishop uses Pax vobis in his first greeting of the people, and only on those days when the Gloria is sung during the mass. See Fortescue 1950: 252-253, Jungmann 1951: 364.