While I'm certainly not Wes (read my username
), I am inclined to wonder what that requirement meant. I
think, which isn't necessarily correct, that it meant no Nekos can be members of nations other than the YSE.
There are precedents of Nekos in plots that aren't always in the YSE, for example Toshiro's old plot has had a few, but that could have been grandfathered in kinda since it already existed before that rule was made. Plus not all YSE plots take place within YSE space, and most YSE plots have Nekos in them.
I'd bet though, if an NH-29 joined Origin, and Origin ever left the YSE (either changed their base of operations to a new nation, or made military moves against the YSE) a body transfer to something else and the body returned would be expected. Else she, like any remaining nekos in the UOC, would be on a KOS list.
I dun know though, as I said, I'm not Wes.