Rules for the sport date back to the 1980s. In 1985, the Canadian national championships were integrated, including both non-disabled and disabled athletes in the same event. In 1990, the sport became the first one to integrate the world championships for non-disabled competitors with disabled competitors. During the 1990s, racquetball was one of the sports that people with disabilities were most likely to play. In the United States in 1995, a wheelchair user brought suit against a racquetball league after he was unable to compete against top level players with a modified two bounce rule, citing the Americans With Disabilities Act and alleging a violation of Title III of the law. The court ruled in the favour of the league, citing that the rule modification for a wheelchair user would fundamentally change the rules of the game. Classification for wheelchair sport on the Paralympic level was being organised by the ISMWSF and included all types of wheelchair users. Despite these changes to sport governance, racquetball has never been included on the Paralympic progreamme as a full medal sport, though it was a demonstration sport at the 1996 Summer Paralympics.