It is because somebody does not think SC duck hunters are smart enough to tell teal from woodies- which is a pretty valid assumption for many hunters everywhere.
North Carolina allows their hunters to shoot at regular starting time, guess they are better at duck identification than SC hunters. Of course they can only hunt teal East of Highway 17 in NC and all their rubberheads live West of 17 (or so it seems if you read their forum).
Pro staff: Pop Tarts, Little Debbie, Armour Vienna Sausage! Just an old duck hunter that grew up hunting from Moes lake to McGirts Lake in beautiful Sparkleberry Swamp.