Canon 852

A patriarch and an eparchial bishop can grant a radical sanation

in individual cases if the validity of the marriage is prevented

by a defect of form for the celebration of marriage required by

law or some impediment from which they can dispense, and, if the

conditions mentioned in can. 814 are fulfilled. In other cases,

and in cases involving an impediment of divine law which has now

ceased, a radical sanation can be granted only by the Apostolic

See.