23 The action of Catholics, of whatever description it may be, will work with greater effect if all of the various associations, while preserving their individual rights, move together under one primary and directive force. In Italy, We desire that this directive force should emanate from the Institute of Catholic Congresses and Reunions so often praised by Us, to which Our predecessor and We Ourselves have committed the charge of controlling the common action of Catholics under the authority and direction of the bishops of the country. So let it be for other nations, in case there be any leading organization of this description to which this matter has been legitimately entrusted.
Source: Graves de Communi Re (Vatican.va)