[Modus vacandi beneficiorum]

[... if someone] resigns any benefice before a notary and witnesses, or into the hands of one having the authority to admit a resignation of this kind, even if the consent of the patron does not intervene, such a benefice becomes vacant.
¶ Item, benefices become vacant through a contract of matrimony by words of the present tense.
¶ Item, if anyone holds an ecclesiastical benefice and enters a monastery, or has taken someone as his wife, his benefices become vacant through the entry into the monastery or religious life, or the contract of matrimony.
¶ Item, no illegitimate person may obtain dignities, parsonages, or offices in a cathedral church, or even in a metropolitan one; and if any illegitimate person holds such benefices without apostolic dispensation, they become vacant and are reserved to the Apostolic See.
¶ Item, they become vacant through irregularities, as if someone has laid violent hands upon a cleric or upon any ecclesiastical person and has thereafter involved himself in divine services.