Originally Posted by
jkirsch
Unless this is a new rule, I don't believe this is the case. Both my fiance and a friend of mine completed the Plat challenge with a LA LAX-LIM J R/T (not an AA codeshare) in 2006.
I forget the exact date the rule was introduced but yes, it is a relatively new rule which has been in effect for several months now. See the AA forum sticky for details.