22 We must touch, Venerable Brethren, on another point of extreme importance, namely, the relation of all the works of Catholic Action to ecclesiastical authority. If the teachings unfolded in the first part of this letter are thoughtfully considered it will be readily seen that all those works which directly come to the aid of the spiritual and pastoral ministry of the Church and which labor religiously for the good of souls must in every least thing be subordinated to the authority of the Church and also to the authority of the Bishops placed by the Holy Spirit to rule the Church of God in the dioceses assigned to them. Moreover, the other works which, as We have said, are primarily designed for the restoration and promotion of true Christian civilization and which, as explained above, constitute Catholic Action, by no means may be considered as independent of the counsel and direction of ecclesiastical authority, especially since they must all conform to the principles of Christian faith and morality. At the same time it is impossible to imagine them as in opposition, more or less openly, to that same authority. Such works, however, by their very nature, should be directed with a reasonable degree of freedom, since responsible action is especially theirs in the temporal and economic affairs as well as in those matters of public administration and political life. These affairs are alien to the purely spiritual ministry. Since Catholics, on the other hand, are to raise always the banner of Christ, by that very fact they also raise the banner of the Church. Thus it is no more than right that they receive it from the hands of the Church, that the Church guard its immaculate honor, and that Catholics submit as docile, loving children to this maternal vigilance.
Source: Il Fermo Proposito (Vatican.va)