UCI (Union Cycliste Internationale) rules allow riders to continue with these low levels. However Astana signed up to the MPCC (Movement pour un Cyclisme Crébile) which has stricter rules and requires riders with low levels of Cortisol to stop competing for for at least eight days, and until their Cortisol levels have returned to normal so Boom under MPCC rules should not start the Tour.
MPCC's press release on Lars Boom yesterday.
Statement here by MPCC on Lotto leaving MPCC earlier this year and reiterating that their rules on low levels of Cortisol stand.
Doubtless it suited Astana managed by Alexander Vinokourov, who was banned for doping on the Tour de France during his racing career, to add some credibility to their bedraggled reputation, especially when their racing licence was under question due a number of their riders failing dope tests.
For the good of the sport's reputation and that of Astana, the MPCC's rules should have been accepted with Boom not starting. Instead what do Astana and Vinokourov do? They walk out of the MPCC, admittedly a voluntary body, so Boom can start.
Sadly Vincenzo Nibali, last year's Tour winner, is a member of the Astana team. Although he is a great and exciting rider, being a part of the Astana team inevitably casts a shadow over his achievements.