[For the first question, the host is correct. Ordering a Universe Realm Powerhouse to kill himself will work since its effects are temporary. Unless it will take the Universe Realm Powerhouse more than a day to kill himself then the effects of the authority will wear off.]
[As for your second question, you are also correct. At the least, the <{Absolute Order}> authority will only last for 1 day but if the Universe Realm Powerhouse has weaker willpower than the average Universe Realm Powerhouse, then the effects will last more than a day.]
When the system replied that to him, Allen immediately knew what skill to use the absolute ability upgrade on.
"System, use the absolute ability upgrade on the <{Absolute Order}> authority."
It was a no-brainer that Allen would choose to upgrade the <{Absolute Order}> authority.