1 "College" is not understood in a strictly juridical sense, that is as a group of equals who entrust their power to their president, but as a stable group whose structure and authority must be learned from Revelation. For this reason, in reply to Modus 12 it is expressly said of the Twelve that the Lord set them up "as a college or stable group." Cf. also Modus 53, c. For the same reason, the words "Ordo" or "Corpus" are used throughout with reference to the College of bishops. The parallel between Peter and the rest of the Apostles on the one hand, and between the Supreme Pontiff and the bishops on the other hand, does not imply the transmission of the Apostles' extraordinary power to their successors; nor does it imply, as is obvious, equality between the head of the College and its members, but only a proportionality between the first relationship (Peter-Apostles) and the second (Pope-bishops). Thus the Commission decided to write "pari ratione, " not "eadem ratione," in n. 22. Cf. Modus 57.
Source: Lumen Gentium (Vatican.va)