NPC may be a different council that NPHC, but both are councils. Consider if you could join two NPC (or "white" as you say- although there are sororities with plenty of diversity) sororities. You can't join two NPCs. You can't join a NPC and a NPHC. Pretty sure you can't join two NPHCs either (someone more knowledgeable, feel free to correct if I'm mistaken).
I'm only answering this seriously just in case this question isn't actually a spam post. For further reference, the search bar is your friend.
