How is an interim UFC champion determined?

I understand the UFC interim title and how it works (someone is holding an interim title until the actual champ returns, the two then fight, the winner is the undisputed champ). But I can't seem to find out how the interim champion is determined. Is there a draw of names and someone gets lucky or does the number one contender in that weight class get the interim championship?|||It's usually the 2 next in line for the Title,example: if Lesnar gets injured, Cain Velasquez will fight Junior Dos Santos for the Interim title,it's simple as that.|||The only reason an interim title is put on the line is when the champ gets hurt. They use the interim to set up the guaranteed #1 contender in theory. They did it with the heavyweight division after Lesnar suffered his injury.





Anyway, they don't have established or known contenders. It has much to do about who the person has fought, consecutive wins, and of course, who can generate the most interest.





For a list of current contenders and champs check out this post http://mmablaster.blogspot.com/2009/02/z鈥?/a>|||In theory, the two next contenders fight for the interim title.





Since there is not ranking system in the UFC, contenders are determined arbitrarily, and usually done by marketability.|||should really be the Number 1 and Number 2 contenders. Doesnt always work out like that though