On 5 May 2020, ARTC submitted an application to vary its 2008 Interstate Access Undertaking. The variation sought to extend the term of the undertaking to 30 June 2021.


On 26 September 2019, the ACCC issued a notice to extend the period of the 2008 Interstate Access Undertaking until 30 June 2020. This notice is in response to ARTC's 29 July 2019 application to vary its 2008 IAU to extend the period for which the 2008 IAU is in operation.