Incidentally, I have redeemed a couple awards the past couple years for family and my OnePass/now MileagePlus number persisted in both; in one case the award ticket was on US and even US's agent on the phone said that indeed it belonged there. The traveler did inherit my then-CO status on their travel on US thanks to the number being on there. So it appears to hold even for at least some non-UA metal awards. Just wanted to throw that in as well.