... the individual bishops do
not enjoy the prerogative of infallibility,
they can ... proclaim Christ's doctrine of infallibility...
when they are dispersed around the world ...
maintaining the bond of unity
among themselves and
with Peter's successor,
while teaching authentically on a matter of
faith or
morals,
concur in a single viewpoint as the one which must be
held ...
This authority is even more clearly verified
when,
Gathered together in an ecumenical council,
they are teachers and judges of
faith and
morals for the universal church.