On 23 December 2020, the Australian Rail Track Corporation (ARTC) applied to the ACCC to vary its 2011 Hunter Valley Coal Network Access Undertaking. The proposed variation seeks to extend the Undertaking by five years, to 31 December 2026. Upon commencement, the proposed variation seeks to be treated as having taken effect as of 1 July 2021, six months prior to the current expiration date of 31 December 2021. The proposed variation seeks to change a number of provisions in the Undertaking that will result in lower prices for Access Holders.