This agreement is officially known as the Agreement between the Government of Australia and the Government of the Democratic Republic of Timor-Leste relating to the Unitisation of the Sunrise and Troubadour Fields.
The Greater Sunrise field straddles the border between the joint petroleum development area (JPDA) established under the Timor Sea Treaty and Australian territorial waters as determined by the 1972 seabed boundary agreement between Australia and Indonesia.
Unitisation of the field would enable it to be treated as one as far as exploitation, regulation, revenue taxation, management and other purposes are concerned, giving certainty to investors by providing a financial framework and international legal basis for development of the field.
This share ratio was amended to both Australia and East Timor getting equal share of the upstream revenue from the field with the signing of the Treaty on Certain Maritime Arrangements in the Timor Sea (CMATS) in 2006.
By virtue of this, this agreement is "read together" with CMATS and the Timor Sea Treaty.