On 16 November 2018 ARTC submitted an application to vary its 2008 Interstate Access Undertaking by two months until 28 February 2019.
On 20 November 2018 the ACCC sent a letter to stakeholders seeking comments on ARTC's proposal. Submissions were due by 4 December 2018.
On 12 December 2018, the ACCC consented to ARTC's application to vary its 2008 Interstate Access Undertaking to extend the term to 28 February 2019.