Turtle, it is a DOT thing and also some states are thinking not allowing CDLs for Diabetics after the chicago event.
It all depends, if you are a type 2, or non-insulin dependent diabetes, you have to have your doctor document it and the DOT doc has to 'talk' to you about it.
If you are insulin dependent diabetic, then you need DOT waiver - I think there are a couple EO members who went through this and got the waiver.
NOW here is the catch, even though you can get away with this with a non-cdl situation, most companies will require you to go through a physical as part of their insurance requirements
BUT
If you decide not to tell either the DOT doc or the company and you have an accident, don't expect the insurance to cover your costs.