According to this law, court rank was given when the descendants reached the age of 21 and over; eligible persons for the system of "Oni" were as follows: the children of the Emperor's relatives or princes in the fifth generation, children and grandchildren of subjects of Third Rank or higher, and children of those who were of Fifth Rank or higher.
令によれば、子孫が21歳以上になったとき叙位され、蔭位資格者は皇親・五世王の子、諸臣三位以上の子と孫、五位以上の子である。