Originally Posted by Muckus
<snip> with the exception of the arrivals lounge which must be on a paid C or F ticket (I have used UA arrivals lounges on Z fare tickets, by the way, although I think you maybe are supposed to be on a full-fare C ticket or higher).
For Arrivals access it doesn't have to be a paid ticket. Award tickets are fine. It just isn't supposed to be an upgraded ticket (except upgrades from C to F... I'm assuming that's fine seeing as how you purchased the C class ticket).