The Australia–New Zealand Maritime Treaty is a 2004 treaty between Australia and New Zealand in which the two countries formally delimited the maritime boundary between the two countries. The treaty was signed in Adelaide on 25 July 2004 by Minister for Foreign Affairs (Australia) Alexander Downer and Foreign Minister of New Zealand Phil Goff. It formalised the ocean borders that had been de facto recognised by both countries since the early 1980s, when the United Nations Convention on the Law of the Sea was created.