It occurs to me that Australia didn't name these regions very consistently. One place is named Northern Territory, but then the others use "Australia" instead of Territory. Then "South Australia" and "Western Australia" use different parts of speech as their modifiers. You'd think the second and third would just follow the precedent set by the first one named. Like, it'd be jarring if it were North Dakota but Northern Carolina.
for the first part, that's cus NT is a territory and not a state (like washington, d.c.), whereas WA and SA are states. I would imagine NT to be renamed "North/Northern Australia" if they eventually become a state.
If it makes it any better, there was a period of time from about the 1880s to 1910s where the Northern Territory was a part of South Australia, meaning South Australia was also the second northernmost state after Qld.
Australia didn't name the states. They existed as the names of individual British colonies before they federalized to become the nation of Australia in 1901. For all intents and purposes, these colonies functioned as separate countries prior to 1901, so asking them to stick to a single naming convention would have been strange
Congrats!
and how could i miss nsw ...