On 18 November 2019, the AER approved APA Group's Victorian Gas Transmission System annual tariff variation proposal for the period 1 January to 31 December 2020. This was after assessing the tariff variation proposal as compliant with the AER's Final Decision on APA Group’s 2018-22 Access Arrangement.

On 22 November 2019, APA Group advised that there was a clerical error in Table A.2(a) of their tariff schedule. APA Group corrected this error in an updated submission to the AER.