On 12 September 2025 we published our draft decision on APA Group's transmission revenue proposal for Basslink for the 2026–30 regulatory control period.
Draft decision
AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Overview - September 2025
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Attachment 1 - Opening regulatory asset base - September 2025
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Attachment 2 - Capital expenditure - September 2025
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Attachment 3 - Operating expenditure - September 2025
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Attachment 4 - Efficiency benefit sharing scheme - September 2025
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Attachment 5 - Capital expenditure sharing scheme - September 2025
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Attachment 6 - Service target performance incentive scheme - September 2025
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Attachment 7 - Transmission pricing methodology - September 2025
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Attachment 8 - Negotiated services - September 2025
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Attachment 9 - Pass through events - September 2025
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Models
Our models relating to the Basslink draft decision.
AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - PTRM - September 2025
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Capex Model - September 2025
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 to 2030 - Basslink - Opex Model
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 - 2030 - Basslink RFM
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 - 2030 - Basslink Opening RAB RFM 2001-06
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 - 2030 - Basslink Opening RAB RFM 2007-15
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AER - Draft Decision - Basslink Electricity Transmission Determination 2026 - 2030 - Basslink Opening RAB RFM 2016-25
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Predetermination conference
On 30 September 2025, we hosted a predetermination conference to provide stakeholders the opportunity to ask questions about our draft decision. The presentation slides are available below.
AER - Predetermination Conference - Basslink draft decision - September 2025
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Submissions
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We value stakeholder input and invite stakeholders to make submissions on our draft decision.
Submissions should be sent to: resetcoord
aer [dot] gov [dot] au (resetcoord[at]aer[dot]gov[dot]au) and will close on 12 December 2025.