Hebrews 7:11-12 Therefore, if perfection were through the Levitical priesthood (for under it the people have received the law), why is there yet a need for another priest to rise, according to the order of Melchizedek, and not to be called according to the order of Aaron?

CAB⁽ⁱ⁾ ¹¹ Therefore, if perfection were through the Levitical priesthood (for under it the people have received the law), why is there yet a need for another priest to rise, according to the order of Melchizedek, and not to be called according to the order of Aaron? ¹² For the priesthood being changed, of necessity there occurs a change of law also.