“As from time immemorial, so too in the future, it is necessary to maintain the principle that “each particular Church must be in accord with the universal Church not only regarding the doctrine of the faith and sacramental signs, but also as to the usages universally received from apostolic and unbroken tradition.  These are to be observed not only so that errors may be avoided, but also that the faith may be handed on in its integrity, since the Church’s rule of prayer (lex orandi) corresponds to her rule of faith (lex credendi).”