§1. The Church, to which Christ the Lord has entrusted the deposit of faith so that with the assistance of the Holy Spirit it might protect the revealed truth reverently, examine it more closely, and proclaim and expound it faithfully, has the duty and innate right, independent of any human power whatsoever, to preach the gospel to all peoples, also using the means of social communication proper to it.
§2. It belongs to the Church always and everywhere to announce moral principles, even about the social order, and to render judgment concerning any human affairs insofar as the fundamental rights of the human person or the salvation of souls requires it.
Source: Code of Canon Law (Vatican.va)