First, it’s just “USADA” not “the USADA.” Look at their website, not once do they refer to themselves as “the USADA” in any publication.
Second, AIU is NOT a doping agency in the traditional sense. They don’t conduct their own tests. They don’t have their own doping control officers (DCOs). Instead, organizations like USADA, Canadian Center for Ethics in Sport (CCES), Clearidium, Professional Worldwide Controls (PWC) and IDTM go out and collect samples from athletes both In-Competition and Out-of-Competition. The samples are sent to WADA approved laboratories (the Untied Sates has two, one in Salt Lake City and the other at UCLA). The results are then reported back to the proper authority, in this case AIU, who is the results management authority.
Interesting to see Tygart taking shots at AIU. He tends to stick to giving it to WADA every chance he gets. But hey, let me grab my popcorn…