21 All associations of the apostolate must be given due appreciation. Those, however, which the hierarchy have praised or recommended as responsive to the needs of time and place, or have ordered to be established as particularly urgent, must be held in highest esteem by priests, Religious, and laity and promoted according to each one's ability. Among these associations, moreover, international associations or groups of Catholics must be specially appreciated at the present time.
Source: Apostolicam Actuositatem (Vatican.va)