On 1 April 2014, the AER made its final decision approving a pricing methodology and negotiating framework for AEMO's 2014-19 regulatory control period and specifying a negotiated transmission service criteria.
On 12 June 2019 AEMO submitted an Undertaking to the AER under section 59A of the National Electricity Law to continue to set prices for shared transmission services as per the pricing methodology already approved for the period 1 July 2014 to 30 June 2019. The AER approved AEMO’s proposed Undertaking. In June 2020, AEMO proposed to extend this Undertaking by an additional year. Consistent with the Undertaking the approved pricing methodology will apply until 30 June 2022.