The treaty will settle the two countries’ maritime border, while also increasing access to the Greater Sunrise oil and gas fields.
UN Secretary-General António Guterres will preside over the signing ceremony to be attended by Australian Foreign Minister Julie Bishop and Deputy Prime Minister Agio Pereira of Timor-Leste, Asia’s youngest nation. Timor-Leste joined the United Nations in 2002.
The treaty could provide a major boost to Timor-Leste’s struggling economy with an agreement on sharing revenue from the Greater Sunrise oil and gas fields, worth between $40 and $50 billion.
Following a final round of negotiations in Kuala Lumpur last month, Australia and Timor-Leste agreed to the treaty that delimits the maritime boundary between them in the Timor Sea and establishes revenue-sharing arrangements.
Timor-Leste in 2016 dragged Australia before the Permanent Court of Arbitration, the world’s oldest arbitration tribunal, based in The Hague, after contesting a previous deal signed in 2006.
Dili wanted that treaty, which also covered the vast Greater Sunrise fields, torn up after accusing Australia of spying to gain commercial advantage during the negotiations.
As the dispute escalated, a group of energy companies including Australia’s Woodside, ConocoPhillips, Shell, and Osaka Gas decided to mothball plans to develop the Greater Sunrise fields.
In January last year, the two countries announced that a new pact would be negotiated through the arbitration court.
Details of the revenue-sharing arrangements have not been released, but a statement from the arbitration court last month said the shares “will differ depending on downstream benefits associated with the different development concepts” for the gas fields.
Discovered in 1974, Greater Sunrise is located 150 kilometres southeast of Timor-Leste and 450 kilometres northwest of Darwin.
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