The waivers will be taken care of at OCS. The doc who does the flight physicals (not a flight surgeon, btw) will look at all of your paperwork (bring ALL of your documentation and make sure it says that you're asymptomatic and any condition won't be a problem in the future) and then compare it to the criteria in the NAMI handbook, and then submit it all to NAMI. You'll then wait an agonizingly long time with potential follow-up visits with various doctors and at some point you will hear back from NAMI whether they waivered you or not.
The key here is to make sure that you have any and all documentation from your doctor(s) saying that you're no longer suffering from ADHD and will be fine without meds. Should you not have that paperwork, you will be subjected to neuropsychological examinations, and let me tell you from experience, OCS is NOT when you want to be taking tests trying to gauge concentration when you can't even stay awake long enough to make it through them.