The answer to that question depends on who the other party in question is.
If the other party is a WTO member with whom we have some sort of interim arrangement in place, Canada would have the ability to appeal—if we felt that it was in our interests—under an interim arrangement.
In the event that the case does not involve a party with whom we have an interim arrangement in place, there's also the possibility that Canada could seek agreement with such a member that neither of us would appeal in the event of a panel decision. Failing that, Canada's other option would be to potentially seek dispute settlement under one of our existing bilateral and regional free trade agreements.
For example, all of our free trade agreements in place also contain dispute settlement mechanisms, including agreements like CUSMA, CPTPP and CETA, so we would also have that ability, should we not have the ability to pursue a dispute from start to finish under one of our bilateral agreements.