The QCA intends to inform itself whether Aurizon Network is complying with the approved 2016 access undertaking (UT4) in light of Aurizon Network's announcements that it is changing its maintenance practices.
In March 2018, the QCA sent Aurizon Network a notice requesting information on its compliance with UT4. Stakeholders were also invited to provide any relevant information.
Aurizon Network provided information as requested by 20 April 2018. The Queensland Resources Council (QRC), Pacific National and Aurizon Coal also provided information within the same timeframe.