Undisputed champion he was still described as "undisputed champion" by some reports. After Joe Calzaghe's super middleweight victory over Mikkel Kessler in November 2007, he was frequently described as "undisputed champion". Others disputed this, because although he held the WBA, WBC, and WBO belts, he vacated his IBF title in November 2006 rather than face a mandatory challenger, and immediately vacated other titles as well. The unified champion is defined as a boxer that holds at least two world championships of major sanctioning bodies (WBA, WBC, WBO or IBF) in their respective division. Around 2004, the World Boxing Association recognized three different
International Boxing Organization 1990s that removed subjective elements from the ratings in an effort to bring more credibility to the sport. From 2014 the organization now uses Boxrec, the independent boxing records keeping and computerized rankings website for IBO's rankings. Many marquee champions have held and continue to hold the International Boxing Organization World title. If a fighter tests positive for banned substances after a bout, he is barred from a rematch. The IBO permits only one champion per weight division. "We have never had more than one champion per weight division nor will we", according to its president Ed Levine. If an