Its challenge in MMA world

Seeking to unify rulesets and rankings, WAMMA requires unified consensus or acceptance of its legitimacy. As UFC is dominant in the sport and therefore Promotions such as Affliction, Adrenaline MMA, StrikeForce, Dream, K-1 and M1 have all worked with WAMMA or expressed an interest in cooperating for undisputed, unified titles. WAMMA states that the UFC has not expressed interest in cross-promotion of any sort.

Another significant challenge to the goal of WAMMA to unify the varied rulesets is the differing rules used between countries and within the United States. The UFC adopted the the "Unified Rules", created by the California State Athletic Commission (CSAC) and New Jersey State Athletic Commission (NJSAC). Then the Association of Boxing Commissioners (ABC), along with members of the NJSAC and the CSAC, proposed a new ruleset that changed weight classes, gave a clearer definition of the "back of the head", clarified other illegal strikes, and banned tactics such as smothering. The UFC said it will not adopt the changes. Although New Jersey's athletic commission was present at the ABC's meeting in Montreal and supported the rule changes, it opposed the ruleset because of the weight classes. The NJSAC also opposed the ruleset because California, Nevada, and Florida's athletic commissions would have to accept the changes to keep the rules unified.