The world's biggest marine reserve in Antarctica may have to be given an expiry date to get countries with interests in the prized waters to agree to it.
Delegations from 25 nations will resume talks in Hobart today on a New Zealand-US proposal for a marine protected area (MPA) in the fish-rich Ross Sea, 3500km south of New Zealand.
The proposed reserve has been scaled back from 2.27 million sq km to 1.34 million sq km after a consensus could not be found at a special meeting of the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) in Germany in July.
At that meeting, nations including Japan and Norway expressed concern about the permanence of a marine reserve in the Ross Sea.
New Zealand's proposal now included a 50-year "sunset clause", which meant the reserve could be revised or scrapped if countries felt it was not working.