A bill filed Friday by Reps. Jim Sensenbrenner (R-Wisconsin) and John Conyers (D-Michigan) would require the U.S. Anti-Doping Agency to provide accused athletes with specific written notification of allegations of doping, give Congress an annual report summarizing enforcement actions, and notify lawmakers of changes to rules.

Armstrong denies doping but dropped his fight against USADA last month. He complained the agency's enforcement process is unfair to athletes.

USADA chief executive Travis Tygart said today the agency's rules give athletes a fair chance to defend themselves, and have been approved by the U.S. Olympic Committee.