The Back To School Fashion Rules Sweepstakes is open to students in the U.S. and Canada. This promotion consists of a sweepstakes and an instant win game. To enter the sweepstakes, you must register to win on your local GGP - owned mall's website. The instant win game tests your knowledge of style between now and the 1920's. You must be 18 years of age or older to be eligible to enter.