Cum ex apostolatus officio

Cum ex Apostolatus Officio is the name of a papal bull issued by Pope Paul IV on February 15, 1559, as a codification or explicitation of the ancient Catholic law that only Catholics can be elected Popes, to the exclusion of non-Catholics, including former Catholics who have become public and manifest heretics. 
The immediate provocation was Pope Paul's suspicion that Cardinal Morone who was popular and expected to succeed him, was secretly a Protestant. Pope Paul IV believed it necessary to prevent or negate Morone's possible election as his successor. He wanted to set it in Church Law that no manifest heretic can lawfully hold the Office of St. Peter.
==External links==
About:
* Paul IV on Sedevacantism
* Cum Ex Apostolatus Officio
Text of Document:
* Cum Ex Apostolatus Officio
* Cum Ex at Sedevacantist
* Another version of Cum Ex from Vatican in Exile
* 
Cum Ex at Wikisource
* 
* Text of Cum Ex Apostolatus in Latin and English
Category:1559 works
Category:16th-century papal bulls
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