Canonum De Ius Positivum
Canons of Positive Law
VII. Law
7.2 Principles of Law
Article 220 - Freedom
Canon 2755 (link)
In accordance with Divine Law and Natural Law, an object cannot "own" other objects. Only fictions can "own" other fictions. Therefore the concept of Freedom is null and void from the beginning along with its twin concept of Slavery.