text: Under UCI rules , the determination of whether a cyclist violated any rules must be made by the cyclist 's national federation , in this case USA Cycling , which transferred the case to the United States Anti-Doping Agency ( USADA ) .
simplified: Under UCI rules , the cyclist 's national federation , in this case USA Cycling decides if the rules have been broken , but because of the science involved they asked the United States Anti-Doping Agency ( USADA ) to help .