The Torres Strait Treaty is between Australia and Papua New Guinea. It concerns matters of sovereignty and maritime boundaries in the area known as the Torres Strait. The Treaty was signed in December 1978 and became active in February 1985.
It defines the border between Australia and Papua New Guinea and provides a framework for the management of the common border area.
Both Australia and Papua New Guinea have liaison officers, based on Thursday Island and Daru, who consult regularly on the implementation of the Treaty at the local level.
For more information go to the Department of Foreign Affairs and Trade: The Torres Strait Treaty website