While the former Imperial Family (Household) Law was adopted to use Permanent Imperial Family regulations as a base, the enlarged Imperial Family (Household) Law issued in 1907 was to regulate a Prince's membership in the Imperial family by issuing an Imperial order or Jogan.
旧皇室典範は当初は永世皇族主義を本則として採用する一方、明治40年（1907年）に公布された皇室典範増補は、王が勅旨または情願により華族に列せられるべきことを定めていた。