How I understand the process before June 1st, is the lab could only report their findings as an AAF for Clenbutorol. What would then happen is the athlete asks for B sample (or not) and AAF is confirmed. Then as we saw with Contador, UCI & WADA appealed Spains decision to clear him, it went to CAS and Contador couldn't establish, on a balance of probability a) how the Prohibited Substance entered his body and b) that he committed no fault or negligence, or no significant fault or negligence and was banned for the full 2 years. That was despite his 4000 page legal evidence. Assuming he couldn't convince an ADO again with the investigation an ATF allows, one assumes UCI(CADF now) would reach the same conclusion and ban Contador similarly.