 It was intended that "blackball" would unify the various existing British-style rulesets (presumably also including the WEPF rules) although this has not yet happened.The governing body for WPA blackball in Europe, with numerous national and local affiliate groups, is the European Blackball Association (EBA).The older World Eightball Pool Federation rules pre-date the WPA blackball rules, and remain popular as amateur league rules in the UK, Ireland, Australia, some other Commonwealth countries, and a few European nations.