Every human creature? Are they saying they expect Protestants to be subject to the Pope’s authority?
Roman Catholics like to say everyone has to follow the pope...until, well, they really have to follow the pope on matters they don't like.
The claim is the pope is over everything and a person has to submit to this for salvation.
Which is a contradiction of Scripture as no where are believers in Christ called to be subject to anyone other than Christ.
That's what it says.
Their official Catechism of the Catholic church doctrine says that there is no salvation outside the Catholic church.
When I first got saved, it took me a while to get used to the idea that the pope only speaks for Catholics, that he had no authority over me any more nor did he speak for Christianity as a whole.
It was very freeing.
Here is a link and a post addressing that very issue.
https://freerepublic.com/focus/religion/4202799/posts?page=465#465
Here's the link to the actual document
Unum Sanctum