On 29 July 2019, ARTC submitted an application to vary its 2008 Interstate Access Undertaking to 30 June 2020.
On 5 August 2019, the ACCC sent a letter to stakeholders seeking comments on ARTC's proposal. Submissions were due by 19 August 2019.
On 26 September 2019, the ACCC issued a notice to extend the period of the 2008 Interstate Access Undertaking to 30 June 2020.