The second part of NJ Transit’s new 30-day ticket expiration policy has started, where people who have unused paper tickets can submit them for refunds and riders with unused mobile app tickets are set to receive credits. The new policy resulted in an initial firestorm from riders over an expiration period that is shorter in length than neighboring Metro North or Long Island Railroad, and over the original plan not including refunds for unused tickets purchased before the June 1. NJ Transit announced its refund policy in May and it started on Aug. 1. Some riders took to social media to questio…