1. IBF - actually enforce mandatorys and seem to follow there rules. And don't have a million champions 2.WBO - same as above but sometimes have imterims and aren't as strict I think 3. WBA . They have a million champions and make up the rules as they go alone. Eg ward is still champion and hasn't had a title fight in 2 years and hasn't had a mandatory in almost 7 years lmfao 4. WBC - complete joke . There blatant bias in the hope of getting an American champion after vitali vacated was a joke. They don't enforce mandatorys at all if there's more money involved . Allowing floyd to defend his 154 title at 147 against a 147 fight lmfao . Not stripping Santa crux dispite never having a mandatory and no longer fighting at the weight. Not having a middleweight mandatory fight in at least 6 years. Etc etc
WBC is a complete joke, anyone outside of boxing doesn't know any of the belts all they know is the term world champion and WBC and wba go out of there way to make a mockery of it