Originally Posted by
SparseFlyer
Codeshare Flights/Flights with other Airlines
If you purchase travel on a codeshare flight or a flight with another airline, you may be subject to the baggage policy and other rules of the airline operating the first flight in your itinerary. For the specific terms and conditions of any Air Canada codeshare partner or other airline sold on aircanada.com, visit the operating carrier's website directly.
That is what I was alluding to in my initial post...