(Minneapolis, MN) -- The N-F-L's new bag policy goes into effect at Mall of America Field tonight. The Vikings' Jeff Anderson says it may take a while to get an easy flow into the stadium. He says it's going to be a challenge and a significant change for fans and expects some frustration for those going to the game. Only clear plastic, vinyl or P-V-C bags that do not exceed 12-inches by six-inches by 12-inches, one-gallon clear freezer bags and small clutch bags approximately the size of a hand will be allowed. There is one exception, fans bringing needed medical supplies to the game can have non-clear bags that will be screened at certain gates.