Empress .. Rudi or others will know this one better than I, but my recollection is that if you book a UA flight, and even give them your AC or AN or MX account #, not your MP #, that UA res can "see" the level "Star Gold" coming up. It usually has shown that on Star * boarding passes for me when travelling AN, Varig, BD, TG etc, so it must also be accessible to res? If so, you MAY get a break re seating choice - like Premier seating - not certain tho.
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~ Glen ~