Canon 597

1. The Roman Pontiff, in virtue of his office, possesses infallible teaching authority if, as supreme pastor and teacher of

all the Christian faithful who is to confirm his fellow believers

in the faith, he proclaims with a definitive act that a doctrine

of faith or morals is to be held. 2. The college of bishops

also possesses infallible teaching authority if the bishops,

gathered in an ecumenical council, exercise their teaching authority, and, as teachers and judges of faith and morals for the

universal Church, declare that a doctrine of faith or morals must

be definitively held; they also exercise it scattered throughout

the world but united in a bond of communion among themselves and

with the successor of Peter when together with that same Roman

Pontiff in their capacity as authentic teachers of faith and

morals they agree on an opinion to be held as definitive. 3.

No doctrine is understood to be infallibly defined unless it is

clearly established as such.