The accepted Hunter Valley Access Undertaking requires ARTC to submit documentation for the purposes of an annual compliance assessment conducted by the ACCC. In summary, section 4.10 and Schedule G of the undertaking requires the ACCC to determine whether ARTC has complied with the financial model and pricing principles specified in the undertaking and whether there has been any under or over recovery of revenue from users that needs to be reconciled.
In June 2012, ARTC submitted its annual compliance documentation for the six month period from 1 July 2011 to 31 December 2011. The ACCC consulted on ARTC's documentation and ARTC submitted revisions to its documentation. In April 2013, the ACCC made a determination that ARTC's revised submission complied with the undertaking and that ARTC was required to refund an over-recovery of $0.73 million to above-rail operators.