Kuwait

Kuwait is a hereditary Amirate held in succession in the descendants of the Mubarak Al Sabah.
The Heir Apparent shall be appointed within a period not exceeding one year from the date of the Amir's investiture, and his appointment shall follow his nomination by the Amir and the swearing of fealty to him by a consenting majority of the members composing the National Assembly sitting in special session.
Where the appointment does not proceed as indicated above, the Amir shall nominate at least three of the above-mentioned lineage to the heirdom and the Assembly shall swear fealty to one of them as Heir Apparent.
To qualify, the Heir Apparent must have attained the age of majority, must be endowed with reason and must be a legitimate son of Muslim parents.
All of the provisions governing the succession to the Principality shall be set out in a special Ordinance to be promulgated within one year from the coming into force of this Constitution. This special Ordinance shall have force of constitutional law and may not therefore be amended save in the manner prescribed for the amendment of the Constitution itself. (Art. 4)

Executive power shall be vested in the Amir, the Cabinet and the Ministers in the manner specified in the Constitution. (Art. 52)

The Amir is the Head of the State. His person is safeguarded and inviolable. (Art. 54)