Thanks!
I found this…
Excommunications reserved to the Holy See:
Canon 1367 One who throws away the consecrated species or, for a sacrilegious purpose, takes them away or keeps them, incurs a latae sententiae excommunication reserved to the Apostolic See; a cleric, moreover, may be punished with some other penalty, not excluding dismissal from the clerical state.
Canon 1370 §1 A person who uses physical force against the Roman Pontiff incurs a latae sententiae excommunication reserved to the Apostolic See; if the offender is a cleric, another penalty, not excluding dismissal from the clerical state, may be added according to the gravity of the crime.
Canon 1378 §1 A priest who acts against the prescription of Can. 977 incurs a latae sententiae excommunication reserved to the Apostolic See.
Canon 977 The absolution of a partner in a sin against the sixth commandment of the Decalogue is invalid, except in danger of death.
Canon 1382 Both the Bishop who, without a pontifical mandate, consecrates a person a Bishop, and the one who receives the consecration from him, incur a latae sententiae excommunication reserved to the Apostolic See.
Canon 1388 §1 A confessor who directly violates the sacramental seal, incurs a latae sententiae excommunication reserved to the Apostolic See; he who does so only indirectly is to be punished according to the gravity of the offence.
I’m’ not sure what Canon 977 means…