Had a lounge dragon in MSP the other day tell me that 1Ks had to be in business class to access the UC even when flying internationally - economy doesn't cut it. After telling her I've been 1K for almost ten years and always use the lounge on international economy itins she said - "really, and you've been let in?" Later in the conversation she said she worked in baggage for 10 years so guess that could explain it..