This article repeats an error that has been widespread in media reporting on the recent document from the Vatican’s Congregation for the Doctrine of the Faith.
You write:
"The document declares that the one holy Catholic Church and Apostolic Church subsists or continues in the Roman Catholic Church alone."
The document does not indicate the "Roman" Catholic Church, but simply the "Catholic" Church. There are more than twenty Catholic Churches in communion with one another. With the Roman Catholic Church being the largest of these Churches and it's Pope being the head of the universal Church, many people are confused into thinking that the Roman Catholic Church and the Catholic Church are the same thing. They are not. If you read more carefully, you'll note that the word "Roman" does not even appear in the document (except in the fourth footnote).