crju: I have no idea, sorry.

I assumed (always a mistake when airlines are concerned) this applied across the whole OnePass programe.

Certainly in Europe you can return ELTS certificates (exactly the same as ELTC's) according to page 10 of the 1998 European Elite Members Guide.

You would need to check with your local OnePass Service Centre.

Please give it a try and let us know how you get on.
MF