Krune and Iem both had absorbed the Blackhole Heavenly Fragment already. In Iem's case, he was a Heavenly Race Member too. As for Krune, he had the support of his Godly Meridians. As one can imagine, both of them were very confident in taking one of the 10 slots of every year.
Krune and Iem would leave to walk around the city every day, trying to find more information. From what they found out, the city didn't have any ruler. It seemed like everyone reached an implicit attitude. If any group tried to take power, everyone would gang up on this group. Because of this, the max they could find was a group or clan ruling a small territory, but none of them risked expansion. Still, the city as a whole needed some rules, so all the hundreds of clans, groups, etc., gathered together to set up those rules. The rule about not going out without permission was one of those.
