Rav Shlomo Zalman Auerbach on Chazal's Authority Over Minors and Non-Jews (8 Nisan)

מנחת שלמה תנינא פ"ב

Do Chazal have the authority to make decrees that affect minors and non-Jews? How does the obligation of chinuch work - is the child obligated on a rabbinic level or is the obligation on the father?