Wrong on all counts....
1. Its 4 years symptom and treatment free.
2. Doctors can't give waivers (as jarrod says NO chance if under 4 years of any symptom and treatment)
3. The AFCOs/ACIOs dont have the final say...the SMO at ADSC does
This goes for TA medicals and Regular medicals and all should be inline with each other in the near future
When your done all your paper work there are Behind Sene offices which really are the ones that hold up and process applications and a Medical Officer (MO for short and SMO is Senior Medical Officer) at this stage can say Yes or No to your Asthma and where you then go to next step. depending on there decision from the evidence they get provided!
In which I ment by Doctor Waiver was if you not had it under x amount years and your O.K.
As sometimes we get these things wrong or sometimes need to clear things up. Also just to clear up AFCO/AFIOs are not medically trained and so can't get advice. Also AFCO/AFIO can have final say if you get processed on your application so be nice and take chocolate to them!
(Am sorry for jargon and if anyone wants to explain a jargon don't ask me

hehe)