Stopovers & UpGrade Rules
There is a thread at Mileage Runs over UA's policy that stopovers less than 24 hrs do not require an additional upgrade cert. That is not my experience with AC.
Does anyone have info on the AC rules? At the other thread someone has quoted UA's policy and its number, and although this would take 15 minutes to read to an agent, at least it is clear. What are the rules at AC?