Aliens are members of any sentient race other than Star Elves and Asguardian Dwarfs. From Year 2000 onward, the ruling Imperial Sovereign gained the power to appoint under the Alien Representation Act any aliens to lifetime but non-hereditary seats in the Imperial Parliament, but aliens appointed to Parliament had to receive approval of a Parliament majority. If the Sovereign was mentally or physically unable to exercise the duties of the office or if the office became vacant, the Council of Twelve assumed the power to nominate alien members of Parliament.