There is no development allowed in Antarctica, per the Antarctic Treaty.
Antarctica is governed by the Antarctic Treaty, agreed to by governments representing about 80% of the world's population. Governments with research stations manage the stations they fund. Nobody has 'control' of Antarctica.
Each country supports its own research station on Antarctica. All of Antarctica is "controlled" by the Antarctic Treaty.
No country has claim to Antarctica
in 1959 with the Antarctic Treaty
Antarctica is -- as is all of planet earth south of 60 degrees S -- governed by the Antarctic Treaty.
In 1959 with the Antarctic Treaty.
Australia may have a territorial claim on the Antarctic continent, but it does not control any part of it.
Antarctica is a condominium in the sense of ownership, and the governing document is the Antarctic Treaty. Australia, Great Britain, Chile, Argentina, New Zealand, France, Norway -- to name a few -- are all in agreement as to the use of the land on earth south of 60 degrees S, which includes the continent of Antarctica.
You may be thinking of the Antarctic Treaty.
Several South American countries claim portions of Antarctica, but no country controls the continent, including other countries in the world that also claim portions of Antarctica.
The name you want is the Antarctic Treaty.