Err, I stand corrected, YYC.

The way I understand MPM, you can build your own routing as long as you're below it - and if you're over MPM, then only allowed when on a published routing. Does that mean that if this routing pushes the trip over MPM, the return segment HAS to be done per published routings OR whatever is shortest, or are "going" and "return" treated separately?

Specific example - knowing that there is an NZ flight serving the route, would SYD-AKL-RAR-LAX-YYC appear to be a permitted return in the above situation?