Formally known as the Timor Sea Treaty between the Government of East Timor and the Government of Australia was signed between
Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, smal ...

East Timor East Timor () or Timor-Leste (; tet, Timór Lorosa'e), officially the Democratic Republic of Timor-Leste ( pt, República Democrática de Timor-Leste, tet, Repúblika Demokrátika Timór-Leste), is an island country in Southeast Asia. It c ...
in Dili, East Timor on May 20, 2002, the day East Timor attained its independence from United Nations rule, for joint petroleum exploration of the
Timor Sea The Timor Sea ( id, Laut Timor; pt, Mar de Timor; tet, Tasi Mane or ''Tasi Timór'') is a relatively shallow sea bounded to the north by the island of Timor, to the east by the Arafura Sea, to the south by Australia. The sea contains a number ...

Timor Sea
by the two countries. The signatories of the treaty were then Australian prime minister
John Howard
John Howard
and his East Timorese counterpart at that time Mari Alkatiri. Image:Timor Gap map.PNG, 400px, The Timor Gap The treaty entered into force on April 2, 2003 following an exchange of diplomatic notes and was backdated to May 20, 2002. The treaty was to run for 30 years from the day it came into force or when a seabed boundary could be established, whichever came earlier. However, the subsequent signing of the Treaty on Certain Maritime Arrangements in the Timor Sea (CMATS) in 2007, the period of validity for the Timor Sea Treaty was extended to 2057, when the validity of CMATS also ends. The Timor Sea Treaty provides for the sharing of the proceeds of petroleum found in an agreed area of seabed, called the Joint Petroleum Development Area and does not determine the sovereignty and maritime boundary between the two countries. The treaty expressly states that the right of either country to claim the overlapping portion of the seabed is maintained. The Timor Sea Treaty ceased being in force when the Treaty between Australia and the Democratic Republic of Timor-Leste Establishing Their Maritime Boundaries in the Timor Sea entered into force on 30 August 2019.

Effects of the treaty

The treaty replaces the Timor Gap Treaty which was signed between Australia and Indonesia on December 11, 1989 which was no longer valid once the territory of East Timor ceased to become a province of Indonesia. It virtually puts East Timor in the place of Indonesia in the Timor Gap Treaty but with a few differences. The significant difference between the Timor Gap Treaty and Timor Sea Treaty is that the latter only creates one Joint Petroleum Development Area, with East Timor getting 90% and Australia 10% of the revenue derived from the area. The former created three zones, with the revenue of the middle Zone of Cooperation being divided equally between the two countries.

See also

*Australia–East Timor border *Sunrise International Unitization Agreement (Sunrise IUA) *Timor Gap *Timor Gap Treaty *Treaty on Certain Maritime Arrangements in the Timor Sea (CMATS) *



Further reading

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External links

Robert J. King, Submission to the Senate Economics Legislation Committee on the provisions of the Timor Sea Maritime Boundaries Treaty, January 2019
Timor Sea Australia–East Timor border Boundary treaties Commercial treaties Joint development areas Treaties of Australia Treaties of East Timor 2002 in East Timor 2002 in Australia Treaties concluded in 2002 Treaties entered into force in 2003 2000s establishments in East Timor 2002 in Australian law