I think the counties where you don't need the permit is 2b 5c 5d. All others need a disability permit.....either temp. ( for one year) or life time disabled. Your doctor must fill out form with your health issue for your request to obtain such a permit. After completed from dr , a $5 check must be sent with form to the PGC......PGC will decide if it will issue you the permit considering your health condition. If issued , it thats about 3 weeks to receive it. It must be carried with you at all times while hunting with the crossbow. A lil card in one corner is cut out...one can laminate it.
Good luck
BOB in PA