ORIGINAL: HansBolter
Have never invested the effort in totaling the resource production in OZ and comparing it against the industry need as once fuel is supplied in sufficient quantity, both LI and HI produce without shortages.
This implies that there is plenty of resource production in OZ to handle the local need. However, I have been known to ship the accumulating resources at places like Port Headland that are not connected to the continent wide rail/road network to ports that are connected. Why? Just because I can and it 'feels' realistic to do so.
As and aside, Pearl is short on resources for the LI located there. It can be supplied by establishing a Continuous Supply convoy between Pearl and Hilo, which produces resources. A single xAKL is sufficient for this job.
Obviously can vary by scenario, but I believe the "normal" state of affairs is that the portion of Australia on the rail-net is short of Oil, Fuel, and Resources. Resources are easy to find (as you noted, Port Headland has plenty; Tasmania also has a surplus as does New Caledonia). Fuel can be brought in from various places. Once the DEI falls the only Oil
surplus I've found is Aden (which gets a small amount in addition to loads of Fuel).
New Zealand also needs Fuel, though between the islands it is self-sufficient in Resources.
At a rough calculation you need about a dozen BP Type D tankers running continuously to keep Australian industry running once Oil is no longer coming in.
I'm actually crazy enough that I actually turned LA's refineries off at one point to create an oil surplus I could ship to Australia.
