Unfortunately it has to be used within a year of the vehicles purchase, so yours is past the date.I'm afraid I don't know a whole lot about it...I quickly browsed the site and saw something about a VIN# being able to be used once. I don't plan on going to any of these events. Let me know if I'm of any use or not. I'm the 2nd owner of an '08 SRT8...bought it w/ 7,000 miles on it and I'm fairly sure the previous owner didn't go to one of these events.
I think it depends on the year of the vehicle, my '06 didn't have an expiration.Unfortunately it has to be used within a year of the vehicles purchase, so yours is past the date.