I don't see why they can't just do it under perhaps a different name (or same if it is an absolute must) but at least a different tag. I'll never understand why some people are unoriginal and use previous assets of no longer official factions, rather than just reinventing themsleves. I mean as in people taking things like the exact same tag and faction name as a previous incarnation. Soke o our more recent official factions have done that. Maybe I'm just being weird though.
Oh well, as long as you've got approval from the original members then it's fine I guess.