On 19 January 2021, AEMO published an issues paper and notice of first stage of consultation on the Market Ancillary Services Specification (MASS), aimed at providing general clarifications to the MASS, while also considering the involvement of distributed energy resources (DER) in the Contingency Frequency Control Ancillary Services (FCAS) markets.
On 14 June 2021, AEMO published a draft MASS and Notice of Second Stage of Consultation. The draft MASS proposes not to amend the MASS to accommodate alternative measurement arrangements for DER participating in FCAS markets, while providing other changes to enhance clarity of the intentions of the MASS.
The AER made a submission to the draft MASS (DER and general consultation) on 11 August 2021.