Significant progress has been made on how to implement measures to protect the Pacific's tuna stocks.
Sources in Australia said that the Pacific Tuna Convention would likely come into force at the end of June 2004.
Greenpeace's oceans campaigner, Quentin Hanich, says Korea, Japan, France and the European Union have all indicated they would sign up.
He says solid progress was made on some difficult issues such as how nations supply information on vessels licensed to fish and ensuring only those ships are allowed to catch tuna.
Mr. Hanich says Greenpeace congratulates Australia, New Zealand and Fiji for very pro-actively driving the development of some of these measures, which he says are needed if the Pacific Tuna fishery is not to end up over-exploited like several other tuna fisheries in the world.