Not sure what forum this fits in but here goes ... I parked at Logan in the alternative-fuel area.. got a ticket ... I appealed it and won but the letter said I might not win in the future because I need a sticker that clearly marks the car as electric because the staff can't tell what is and isn't electric. Um, OK. Is there a standard? I dunno. I call Tesla -- not aware of anything federal or state (massachusetts). I call Mass Port (resposible for parking @ Logan airport) and they have no idea either. "Uh, so what do I do?" "Keep appealing it I guess" Ugh. Maybe I'll print my own professional-looking sticker. Or maybe I'll just put a post-in note on the car.