"Of this sort of teaching Vatican II wrote: "This religious submission of will and of mind must be shown in a special way to the authentic teaching authority of the Roman Pontiff, even when he is not speaking ex cathedra. That is, it must be shown in such a way that his supreme teaching service is acknowledged with reverence, the judgments made by him are sincerely adhered to, according to his manifest mind and will"."
January 1, 1970