[QUOTE=Seat11A;27051464] Suffice it to say, why don't the airline staff know their own access rules?
/QUOTE]
I think it's because each airline builds and operates their lounges for their customers (flying their metal). Accepting other airline pax is their priority #2,or possibly #202.
Try presenting an RJ,S7,or UL BP to CX@HKG lounge staff and see their reaction