[Clutch Munny]

It's more the breadth of "on ground of X", as opposed to "on ground of excluded party's positive participation in X" that I was smurfing.

I dunno. Do you think that a systematic prejudice against stateless persons (born on the high seas, say) ought to run afoul of the national origin clause? A clause prohibiting discrimination on ground of gender ought to prohibit discrimination against persons of ambiguous gender, it seems to me. But this may just highlight the fact that IANAE.