In today’s reading from the Decree on the Mission Activity of the Church we begin the second section in the chapter on missionary work: “Preaching the Gospel and Gathering together the People of God.”
In addition to being a Christian Witness, article 13 discuses the need for preaching.
Here is the footnote:
2. Cf. Declaration on “Religious Liberty” 2, 4, 10; constitution, “The Church in the Modern World.“