"All those things are to be believed by divine and Catholic faith which are contained in the written Word of God or in Tradition, and which are proposed by the Church, either in solemn judgement or in its ordinary and universal teaching office, as divinely revealed truths which must be believed."
These quote states that the infallible teachings which Catholics owe
Assentus Fidei, this is "Divine and Catholic Faith", are the ones that concern the
Word of God or Divine Revelation (As explained before, Scripture and Tradition) independently of what
organ of infallibility is used. These teachings are necessarily embodied in the two first levels of Magisterial teachings:
1. Infallible Dogmas: Truths taught as divinely revealed"-> These are truths contained directly in the Word of God and which the magisterium has affirmed to be divinely revealed. They are infallible and, to them the faithful owe the “obedience of faith” or “divine and Catholic faith.”.
2. Definitive Doctrines: Secondary Truths -> This is when the Magisterium proposes ‘in a definitive way’ truths concerning faith and morals, which, even if not divinely revealed, are nevertheless strictly and intimately connected with Revelation, these must be firmly accepted and held.
You step out of these two above and you are dealing with fallible teachings which Catholics owe obedience / religious or external assent to BUT are not necessarily to be believed with the same "Obedience of Faith” or “Divine and Catholic faith (assensus fidei) than the first two, which is what the Vatican I quote refers to, and that is why Religious Liberty or Ecuмenism will never be infallible dogmas or definite doctrines.