10 Another field where the junior clergy find a wide scope and great stimulus for maintaining and advocating exemption from every bond of legitimate authority is the so-called Popular Christian Action. This action, Venerable Brethren, is not in itself reprehensible, nor by its nature does it lead to contempt of authority. Many, however, misunderstanding its nature, have voluntarily abandoned the rules laid down for its promotion by Our Predecessor of immortal memory.
Source: Pieni L'Animo (Vatican.va)