Regardless to what was posted, you can enter any challenge, no matter where you live.
Theres two, so those who have not seen season two can still participate without being spoiled.
Those who are watching season two are still able to enter the non spoiler challenges, and people may enter both challenges if they wish.
Hope that clears a few things up.
Any Questions/Comments, just leave a comment and I'll try to help as best I can :)