Leaving a fraternity to join another

[shadow267]

Hey, I'm looking for help for a friend of mine. I don't really know how fraternities work and found this site looking for information. My friend joined a fraternity, however after rethinking things and a fraternity coming back on campus he decided he wants to change but isn't sure how or if its possible. I know I've heard that once your join your stuck for life and can't join another but is it different if he wants to leave an NIC fraternity to join a black fraternity (NPHC). Or are all the rules universal.