From the post: Positive and Negative descriptions of subsidiarity:
Negative Form: It is an injustice, a grave evil and a disturbance of right order for a larger and higher organization to arrogate to itself functions which can be performed efficiently by smaller and lower bodies.
[Pius XI, Quadragesimo Anno 5]
Positive Form: A community of a higher order ... should support a community of a lower order in case of need and help to coordinate its activity with the activities of the rest of society, always with a view to the common good. [John Paul II, Centesimus Annus 48]