Lance Armstrong is going to miss this week's Tour of the Gila cycling race in New Mexico. Organizers blame what they say is a rarely enforced International Cycling Federation rule.
Race director Jack Brennan says the UCI plans to enforce a rule that prohibits top-level professional teams from competing in national-level events such as the 23rd Tour of the Gila.
The decision means Armstrong, who had planned to enter, won't participate. The race runs Wednesday through Sunday in Silver City.
Officials from the UCI - cycling's international governing body - did not immediately respond Monday to e-mails seeking comment.
It would have been Armstrong's first competition since he broke his collarbone last month.