I can see that some OXP stations may not (and indeed should not) have any 'allegiance'. It might be best if the game does not try to give allegiance at all where this is not specified, although I'm not sure whether 'null' does this anyway. TBH I'm not sure what 'null' even does.
Looking to the future, perhaps a 'None' allegiance should be available to OXP authors, and old OXPs which have not been updated should be considered and perhaps those where allegiance is not specified are automatically given a 'none' allegiance as this is probably better than having an in-appropriate allegiance given.
, the friendliest Gourd this side of Riedquat.