generic question about boxing ranks/belts

[nivek535]

hey there! can anybody educate me on how the belt systems work?
what's with different belts at the same weight class, how do they compete for it, how do mandatory challenges work, title defenses, etc...
if the question is vague i dont even know

[jas]

Money and influence.

(a) Each WBO World Champion except in the Heavyweight Division shall defend his title at intervals not greater than nine (9) months counting from the date of the acquisition thereof or from the last compulsory defense,