What is says specifically is that he can't have access to any of the training facilities of the USOC Training Centers or other programs of the USOC including but not limited to grants, awards, or employment pursuant to the USOC policies.
(He is of course also ineligible to be an athlete representative for 10 years).
I am not sure the ban on access to training centers applies to attending track meets. I believe that refers to things like the USOC training center at Colorado Springs. The USOC, as far as I know, does not own, certify, or sanction anything that happens at Hayward Field or Monaco. If you know more about the USOC policies that specifically address his attendance at the trials, then I would like to see that policy. I just don't think attendance is covered by his ban. Maybe it should be, but best I can tell it is not.
If he was issued a credential, as was alleged in Eugene, I think you could make a case that he was violating his ban. I'm sure there are policies regarding who can be issued a credential and coaches, managers, athletes, and officials may be the limit. I wouldn't know without some research.
In this case, though, the question must be asked what can be done about it. If he is violating his ban (and there is actual evidence on this, not just allegation) then the ban can be extended. That is it, though. The athletes can continue to associate with him all they want.