Pascendi Dominici Gregis §56

⁵⁶ Lest what We have laid down thus far should fall into oblivion, We will and ordain that the Bishops of all dioceses, a year after the publication of these letters and every three years thenceforward, furnish the Holy See with a diligent and sworn report on all the prescriptions contained in them, and on the doctrines that find currency among the clergy, and especially in the seminaries and other Catholic institutions, and We impose the like obligation on the Generals of Religious Orders with regard to those under them.