From the Code of Canon Law of the Catholic Church
Canon 757: It is proper for presbyters, who are co-workers of the bishops, to proclaim the gospel of God; this duty binds especially pastors and others to whom the care of souls is entrusted with respect to the people committed to them. It is also for deacons to serve the people of God in the ministry of the word in communion with the bishop and his presbyterium.
Canon 758: By virtue of their consecration to God, members of institutes of consecrated life give witness to the gospel in a special way and the bishop appropriately calls upon them as a help in proclaiming the gospel.
Canon 759: By virtue of baptism and confirmation, lay members of the Christian faithful are witnesses of the gospel message by word and the example of a Christian life; they can also be called upon to cooperate with the bishop and presbyters in the exercise of the ministry of the word.
Canon 760: The mystery of Christ is to be set forth completely and faithfully in the ministry of the word, which must be based upon sacred scripture, tradition, liturgy, the magisterium, and the life of the Church.
Canon 761: The various means available are to be used to proclaim Christian doctrine: first of all preaching and catechetical instruction, which always hold the principal place, but also the presentation of doctrine in schools, academies, conferences, and meetings of every type and its diffusion through public declarations in the press or in other instruments of social communication by legitimate authority on the occasion of certain events.
Canon 229 §1: Lay persons are bound by the obligation and possess the right to acquire knowledge of Christian doctrine appropriate to the capacity and condition of each in order for them to be able to live according to this doctrine, announce it themselves, defend it if necessary, and take their part in exercising the apostolate.