Click here to see a photo taken of the interior of the vehicles. It does seem that only six seats are fitted with seatbelts. The remainder of seats appear to have nothing else, not even lap belts fitted. But if you zoom in to its maximum resolution, small, circular blue 'seatbelt' stickers can be seen affixed to the bottom-sides of all seats facing the aisles, so we assume there are seatbelts there somewhere...