"Rich S." wrote

My advice is to ignore any advice you receive on Usenet and get ahold of
AOPA. Their medical staff are the most authoritative resource on the
subject and have *your* interest at heart - not the FAA's. If you need to
join the AOPA to gain the benefit of this, please do - it will be the best
investment you can make.

I would not argue against contacting AOPA, in any way. However, the only
advise he should pay attention to (in this case) from usenet, is to not
necessarily give up on flying (or his dad flying) because of diabetes.

That is certainly good advise, in this situation, I think you would agree.
--
Jim in NC