I was reading that same chapter/annex last night and I couldn't find any restrictions. Yeah it's ripe to be abused.
I can see it now at border control under Obama.
Border control: state your business?
Foreign traveler: I'm here to sell my hair and bodily fluids!
Border control: Nice. Here is your expedited 10 year business visa! Good luck in your business and travels inside the United States.
Foreign traveler: Where is the closest ObamaCare and EBT offices?
Border control: Take a left after two doors down the hall.
Foreign traveler: Yippeeeee...
EXACTLY