It's not directly the (absence of a) doping charge they claim is the problem here, ASO has the right to block anyone that 'threatens the reputation or image of the organisation or the event'. Not very clear cut in any case.
Which they’ve tried to do before and failed, not just with Boonen but with Virenque way back. Froome can point at any number of riders who’ve served bans who are allowed to ride, like Valverde. How does allowing them to ride not damage the image of the race?
It's not directly the (absence of a) doping charge they claim is the problem here, ASO has the right to block anyone that 'threatens the reputation or image of the organisation or the event'. Not very clear cut in any case.