It means it's legal for you to ship reptiles yourself, because you've proven to them you know what you're doing, and you're in their system. Otherwise, you have to go through Shipyourreptiles.com.
(Which totally works, but presumably costs more? And once in a while some jerk will ship a rattler or whatever, which ruins it for everyone, because then SYR loses their certification to ship any and all snakes.)