Whether by the penitent's permission, a priest may reveal to another a sin which he knows under the seal of confession?

Objections

Objection 1 : It would seem that a priest may not, by the penitent's permission, reveal to another a sin which he knows under the seal of confession. For an inferior may not do what his superior may not. Now the Pope cannot give permission for anyone to divulge a sin which he knows through confession. Neither therefore can the penitent give him such a permission.
Objection 2 : Further, that which is instituted for the common good of the Church cannot be changed at the will of an individual. Now the secrecy of confession was instituted for the good of the whole Church, in order that men might have greater confidence in approaching the confessional. Therefore the penitent cannot allow the priest to divulge his confession.
Objection 3 : Further, if the priest could grant such a permission, this would seem to palliate the wickedness of bad priests, for they might pretend to have received the permission and so they might sin with impunity, which would be unbecoming. Therefore it seems that the penitent cannot grant this permission.
Objection 4 : Further, the one to whom this sin is divulged does not know that sin under the seal of confession, so that he may publish a sin which is already blotted out, which is unbecoming. Therefore this permission cannot be granted.