Project timeline

Overview

Initiation
Proposal
Draft decision
Revised proposal
Final decision

Final decision

On 21 May 2026, we released our final decision on Australian Gas Networks' (SA) (AGN) access arrangement proposal for the 2026–31 period commencing 1 July 2026.

Our final decision is set out in the Overview and accompanying attachments. For issues that were settled at the draft decision stage or required only minor updates, our draft decision reasons form part of this final decision.

AER - Final decision - AGN (SA) access arrangement 2026–31 - Overview - May 2026
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AER - Final decision - AGN (SA) access arrangement 2026–31 - Attachment 1 – Capital base, Regulatory depreciation and Corporate income tax - May 2026
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AER - Final decision - AGN (SA) access arrangement 2026-31 - Appendix A - Regulatory depreciation - May 2026
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AER - Final decision - AGN (SA) access arrangement 2026–31 - Attachment 2 - Capital expenditure - May 2026
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AER - Final decision - AGN (SA) access arrangement 2026–31 - Attachment 3 - Operating expenditure - May 2026
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AER - Final decision - AGN (SA) access arrangement 2026–31 - Attachment 5 - Reference services, tariffs and non-tariff components - May 2026
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AGN - SA AA 1 July 2026 to 30 June 2031 - Clean - May 2026
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AGN
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AGN - SA AA 1 July 2026 to 30 June 2031 - Mark Up - May 2026
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AGN
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AGN - SA AA GTCs - Clean - May 2026
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AGN
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AGN - SA AA GTCs - Mark Up - May 2026
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AGN
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Models

Our models relating to AGN's final decision.

AER - Final decision - AGN (SA) access arrangement 2026–31 - Capex Model - May 2026
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AER - Final decision - AGN (SA) access arrangement 2026–31 - CESS Model - May 2026
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AER - Final decision - AGN (SA) access arrangement 2026–31 - Opex Model - May 2026
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AER - Final decision - AGN (SA) access arrangement 2026–31 - ECM Model - May 2026
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AER - Final decision - AGN (SA) access arrangement 2026–31 - Post Tax Revenue Model - May 2026
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AER - Final decision - AGN (SA) access arrangement 2026–31- Roll Forward Model - May 2026
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AER - Final decision - AGN (SA) access arrangement 2026–31 - RFM Depreciation Module - May 2026
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Consultant reports

We commissioned the following report, which we took into account when making our final decision for AGN

Deloitte Access Economics - Labour price growth forecasts - March 2026
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Deloitte Access Economics (DAE)
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