/summa/XP/XPII/XP_Q24:
We must now consider absolution from excommunication: under which head there are three points of inquiry:
(1) Whether any priest can absolve his subject from excommunication?
(2) Whether a man can be absolved from excommunication against his will?
(3) Whether a man can be absolved from one excommunication without being absolved from another?