§1. Minor seminaries and other similar institutions are to be preserved, where they exist, and fostered; for the sake of fostering vocations, these institutions provide special religious formation together with instruction in the humanities and science. Where the diocesan bishop judges it expedient, he is to erect a minor seminary or similar institution.
§2. Unless in certain cases circumstances indicate otherwise, young men disposed to the priesthood are to be provided with that formation in the humanities and science by which the youth in their own region are prepared to pursue higher studies.
Source: Code of Canon Law (Vatican.va)