Originally Posted by
Argonaut1000
Can’t give an example as to whether this even occurs now or would require a separate ticket. I seem to recall that multiple fares could be used on a single AC 014 ticket in the past.
Originally Posted by
ACflyerDE
Separate fares make no difference as long as they are combined under one ticket on 014 stock.
Correct, so long as it's on a 014 ticket and operated by a *A carrier it'll generate SQC but that probably makes it sound easier than it is. Generally, to ticket with AC, you'll need at least one AC operated trans oceanic flight and most likely one AC fare on the ticket. TA issued tickets might be able to get around some of that but direct carrier issued tickets can be even more restrictive around what they will actually issue.
Lots of AC fares these days carry restrictions on combinability. Some will restrict which carrier's fares they can be combined with and lots will state that no more than two international fares are permitted in the combination. I've seen these types of restrictions most often on discount (P, Z) fares.
The SQC rules are likely more permissive than what it's practically possible to actually ticket.