Any diabetic on insulin can only qualify for a Class III. I am a type II diabetic and have a 6 year waiver but the every 6 month Class I is still pass/fail. The docs always check your urine for sugar and if it looks high, they can still fail you. Dont know much about Type 1 diabetes but diet and exercise plus the oral meds work well for now. I am 48 and been diagnosed for 3 years. No family history, good shape, normal diet. Took me by surprise. Best of luck.