11.   It was not immediately clear when he would formally assume the throne vacated by the heart attack death of his father Friday.

12.   Naruhito is the son of Emperor Akihito and is next in line to assume the throne.

13.   Second son Bhumibol then assumed the throne.

14.   Since women are not allowed by law to assume the throne, Princess will lose her official title and her yearly stipend if she gets married.

15.   The army and the administration pledged allegiance to Mohamed VI before he assumed the throne Friday.

16.   Under current Japanese law, only male members of the imperial family can assume the throne.

17.   Unlike her brothers -- imperial heir Naruhito and Prince Akishino, who is second in line to the throne -- Sayako cannot assume the throne.

18.   Under Japanese law, only male members of the imperial family can assume the throne.

19.   Under Japanese law, only males are allowed to assume the throne.

20.   Under postwar Japanese law, only males are allowed to assume the throne.