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Creed › … › Paragraph 4. Christ's Faithful - Hierarchy, Laity, Consecrated Life
Participation in Christ's kingly office
In the Church, "lay members of the Christian faithful can cooperate in the exercise of this power [of governance] in accord with the norm of law." and so the Church provides for their presence at particular councils, diocesan synods, pastoral councils; the exercise in solidum of the pastoral care of a parish, collaboration in finance committees, and participation in ecclesiastical tribunals, etc.
Source: Catechism of the Catholic Church (Vatican.va)