§1. A pastoral council consists of members of the Christian faithful who are in full communion with the Catholic Church—clerics, members of institutes of consecrated life, and especially laity—who are designated in a manner determined by the diocesan bishop.
§2. The Christian faithful who are designated to a pastoral council are to be selected in such a way that they truly reflect the entire portion of the people of God which constitutes the diocese, with consideration given to the different areas of the diocese, social conditions and professions, and the role which they have in the apostolate whether individually or joined with others.
§3. No one except members of the Christian faithful outstanding in firm faith, good morals, and prudence is to be designated to a pastoral council.
Source: Code of Canon Law (Vatican.va)