Under NBN Co’s SAU, NBN Co must lodge a replacement module application covering the regulatory cycle after 2026.
On 1 July 2024, the ACCC provided notice to NBN Co specifying that the due date for lodging its replacement module application is 2 July 2025. The ACCC also provided a request for information and documents in support of NBN Co’s application.
NBN Co was required to consult with access seekers and consumer advocacy groups regarding relevant expenditure proposed during that regulatory cycle before lodging its application.
NBN Co provided its replacement module application and supporting documents to the ACCC on 2 July 2025.
The ACCC published NBN Co’s replacement module application and redacted supporting materials on 24 July 2025, pending consideration of NBN Co confidentiality claims within these and other supporting materials.
The ACCC assessed the replacement module application lodged by NBN Co, consulted with stakeholders, assessed the proposal, and made a replacement module determination based on its assessment.
The replacement module determination establishes a set of access terms and conditions for the upcoming regulatory cycle of 3 years. It also addresses the other matters raised in NBN Co’s replacement module application.
The ACCC extended the timeframe for making the determination under clause 5.8(e) of NBN Co’s Special Access Undertaking, by giving written notice to NBN Co and publishing the notice on its website. The ACCC made its replacement module determination within the extended timeframe of 2 September 2026.
Consultation during the replacement module process
We published our consultation paper on the replacement module on 22 August 2025. Following this, we published a consultation paper focusing on benchmark service standards on 18 November 2025.
We published our draft replacement module determination on 31 March 2026 and stakeholder submissions were due by 12 May 2026.
On 11 June 2026, the ACCC wrote to NBN Co to invite submissions on a methodology for potential adjustments to certain expenditure identified in the draft determination.
We asked NBN Co and other interested stakeholders to provide submissions by 26 June 2026.
Extension to timeframe for ACCC's final replacement module determination
On 21 April 2026, the ACCC extended the timeframe for making its final replacement module determination by 3 months. The new deadline was 2 September 2026, under clause 5.8(e) of NBN Co's Special Access Undertaking.
The ACCC extended the timeframe by giving written notice to NBN Co and publishing a notice on its website. The notice outlines the ACCC's reasons for the extension.
Replacement module determination and reasons
The ACCC published its replacement module determination under NBN Co's Special Access Undertaking (SAU) on 27 August 2026, together with a document of reasons and supporting materials.