<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by FRAC:
Sorry to hijack the thread, for your information, it was a PARSEA fare with Fare Basis code HLXAPT3M.
I was looking for something that I could refer to like: If nothing is specified in the fare rule, please refer to CIC*XXX/YYY.</font>
No such CIC as far as I know. You just have to ask them to see the fare rules for the stopover rule. Yours is a published fare so Reservations should definitely be able to see the full fare rules (since you bought from AC. To tell you they can't is not true, otherwise what if you're calling to make changes?)
Next time ask the agent that is processing the upgrade for you to make a note in the PNR at the same time.