Yeah, what the hell is up with that? And, actually, it's only three states and Ontario.
From the official rules of the contest:
"Who May Enter: Contest is open only to legal U.S. residents of New York, Ohio, or Pennsylvania or legal residents of Ontario (Canada), who are aged 18 or older as of date of entry and who have a valid driver’s license or government issued I.D. (the “Registrant,” “Entrant,” or “Contestant”)..."