 These associations promote the activities of their member leagues and offer support and advice to their members, but do not establish rules.Outside of the United States many roller derby leagues enjoy support from their national skate federations such as the Skate Australia, the British Roller Sports Federation and Roller Sports Canada.USA Roller Sports (USARS) is recognized by the International Roller Sports Federation (FIRS) and the United States Olympic Committee (USOC) as the National Governing Body of competitive roller sports in the United States, including speed, figure, hockey, and slalom.