65 No one of good-will and vision will think of refusing the State, in the exceptional conditions of the world of today, correspondingly wider and exceptional rights to meet the popular needs. But even in such emergencies, the moral law, established by God, demands that the lawfulness of each such measure and its real necessity be scrutinized with the greatest rigor according to the standards of the common good.
Source: Summi Pontificatus (Vatican.va)