If you have a non resident carry permit for Pennsylvania and if your Maryland Wear Carry expires while your PA permit is current. Make sure you send a copy of your updated Md permit to the Sheriffs office where the permit is issued. I have had my permit issued by York Co for I guess 20 years which during that time my Md permit had been renewed many times. York Co had never sent a notice asking for new permit dates nor was there ever anything said about it. Till the letter I received on Friday stating that my Md permit had expired (renewal date was 7/31 new one in my hand) and now my Pa permit was revoked. Frantic phone call, email and hard copy sent to get it reinstated ASAP. I go to Pa a lot on business. Just FYI Chris