LGA_UAL: You have to use the CO website to find the upgrade restriction text, you won't find it on the rules displayed on ITN or Travelocity. It's displayed fairly close to the beginning of the fare rules.
If the fare's been changed you may not be able to find the rules for the fare basis you're ticketed in. I don't know of any way to pull up the rules for a ticket that has already been issued if the fare isn't still available. If that's the case you have to take their word for it.
p.s. Are you going to be around LGA on Thursday morning, by any chance?
[This message has been edited by Old Gold (edited 04-19-2002).]