Aurizon Network's 2025 UT5 DAAU

Status
In progress

On 22 December 2025, we received a draft amending access undertaking (the 2025 UT5 DAAU) from Aurizon Network seeking to amend the 2017 access undertaking and extend the expiry of the undertaking until 30 June 2037.

We have commenced an investigation to decide whether to approve, or refuse to approve, Aurizon Network’s 2025 UT5 DAAU.

Aurizon Network’s 2025 UT5 DAAU, regulatory submission and supporting information are available below.

We invite stakeholders to make written submissions to the QCA on the 2025 UT5 DAAU by 17 March 2026.

We have also published a statement of regulatory intent, which sets out how we intend to manage the regulatory process.

Aurizon Network’s 2025 UT5 DAAU submission and supporting information

Date		Title	Document
22 December 2025	Submission	Aurizon Network’s 2025 UT5 DAAU supporting submission (redacted)	pdf, 27.40 Mb
22 December 2025	Submission	Attachment A – Frontier Economics report – The allowed return on debt	pdf, 629.02 Kb
22 December 2025	Submission	Attachment B – CEG report – Efficient regulatory benchmarks and transitions for the cost of debt	pdf, 928.20 Kb
22 December 2025	Submission	Attachment C – NERA report – Depreciation approaches	pdf, 1.24 Mb
22 December 2025	Submission	Attachment E – Marsh report- Conceptual insurance program design and pricing	pdf, 958.69 Kb
22 December 2025	Submission	Attachment F – Finity report – Review of self insurance risk premium (redacted)	pdf, 2.49 Mb
22 December 2025	Submission	Attachment G – Oxford Economics report – Cost escalation forecasts to 2031-32	pdf, 885.60 Kb
22 December 2025	Submission	Attachment I – White and Partners report – 900 Ann Street Lease Benchmark (redacted)	pdf, 868.00 Kb
22 December 2025	Submission	Attachment J – Minter Ellison Consulting report – ICT expenditure 10 year outlook (redacted)	pdf, 15.01 Mb

Aurizon Network’s 2025 UT5 DAAU

Date		Title	Document
22 December 2025	Submission	Aurizon Network’s 2025 UT5 DAAU (amendments marked up)	pdf, 4.36 Mb
22 December 2025	Submission	Aurizon Network’s 2025 UT5 DAAU – standard access agreement (amendments marked up)	pdf, 733.79 Kb
22 December 2025	Submission	Aurizon Network’s 2025 UT5 DAAU – standard train operations deed (amendments marked up)	pdf, 773.93 Kb

QCA statement of regulatory intent

Date		Title	Document
23 December 2025	Other documents	QCA’s statement of regulatory intent – 2025 UT5 DAAU	pdf, 318.29 Kb

Notice of investigation and time periods

Date		Title	Document
23 December 2025	Notice	Notice of investigation – Aurizon Network’s 2025 UT5 DAAU	pdf, 154.02 Kb

Correspondence

Date		Title	Document
10 July 2025	Other documents	QCA – response to update on development of a DAAU	pdf, 101.26 Kb
08 July 2025	Other documents	Aurizon Network and QRC – update on development of a DAAU	pdf, 174.43 Kb
21 November 2024	Other documents	QCA – response to Aurizon Network’s approach to developing regulatory arrangements	pdf, 106.15 Kb
06 November 2024	Other documents	Aurizon Network – stakeholder engagement plan	pdf, 923.64 Kb
06 November 2024	Other documents	Aurizon Network – approach to developing regulatory arrangements	pdf, 288.18 Kb