Sand dune, the domestic operation (737) operates to the CAO48 exemption. This means that the 737 can do SYD-PER-SYD and other long days. I've never operated under that award so I can't state with experience how it is. I've spoken to many crew who have operated under it though and they say that you do long days they like the manner in which you also get some good time off. Personally I'd like to see the exemption allowed for some daylight 767 domestic ops- with attendant 'benefits' for the respective crew of course.
Let's be honest though. CAO48 is a joke. It makes very few differentiations between tours of duty that commence at 2200hrs or 0800 hours. The restrictions on flight times take into no account the time of day, time zone changes, etc. If CASA really had some credibility they would have been looking at this eons ago and rostering something that had more logic to it than the current farce that is our flight and duty time limitations.