Once you reach 50 you will select your first specialization. Once a specialization is selected, you will have to gain another 10 levels before selecting another. The code simply allows you to choose from all 8 specializations instead of the 2 that are available to begin with.
"Either it'll move me, or it'll move right though me. Fully. Completely." - Gordon Downie 360/PSN/Steam= NauticalDisasta