In a statement, the agency said it was releasing its "reasoned decision" and more than 1,000 pages of supporting evidence to the Union Cycliste International and the World Anti-Doping Agency.
"The evidence shows beyond any doubt that the US Postal Service Pro Cycling Team ran the most sophisticated, professionalised and successful doping program that sport has ever seen," it said.
US cyclist Lance Armstrong was officially branded a drugs cheat in August by the US Anti-Doping Agency as it stripped him of his record seven Tour de France titles.
Armstrong was also banned from cycling for life by the agency, which said his decision not to pursue arbitration in an effort to clear himself of doping charges levelled in June triggered the action.
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It has become obvious that competing in the top level Tours (TdF, Giro, Vuelta) in the recent past necessitated drug-taking as standard practice. I can exuse them all claiming they didn't when they did, but in the end it is the vociferousness with which LA declared his innocence (and aggression to those who challenged or doubted him) that is the biggest disappointment now that it appears he was probably the worst culprit of them all.