Primary Frequency Response under Normal Operating Conditions

Market National Electricity Market
StageSecond Stage
ConvenorAEMO NEM
Accepting submissions?Yes
Submissions close16/03/2020

AEMO appreciates the time and effort parties have spent in making submissions to Stage One of this consultation on amendments to the Market Ancillary Services Specification (MASS) and the Regulation Contribution Factor Procedure (Causer Pays procedure). A total of 10 submissions were received and have been published on the consultation page. This provides an update on progress on these consultations and a revision of the timetable.


AEMO has published the Draft Determination, which is linked below.

AEMO invites written submissions on the matter under consultation.

Please identify any parts of your submission that you wish to remain confidential and provide the reasons why you wish that information to be treated as confidential. AEMO may still publish that information if it does not consider it to be confidential but will consult with you before doing so.

Consulted Persons should note that material identified as confidential may be given less weight in the decision-making process than material that is published.

Submissions in response to this Notice of Second Stage of Rules Consultation should be sent by email to, to reach AEMO by 5.00pm (Melbourne time) on 16 March 2020.

All submissions must be forwarded in electronic format. Please send any queries about this consultation to the same email address.

Submissions received after the closing date and time will not be valid, and AEMO is not obliged to consider them. Any late submissions should explain the reason for lateness and the detriment to you if AEMO does not consider your submission.

Causer Pays

As flagged in the consultation notice, the proposed changes to the Causer Pays procedure were contingent on the AEMC making a rule on ERC0263 “Removal of disincentives to primary frequency response”. The AEMC has deferred a draft determination on this rule to 24 September 2020. Therefore AEMO is halting further consideration of the matters flagged under this Causer Pays consultation until a later date to be advised. 

The dates in this revised timetable below apply only to the MASS consultation.

Updated timetable for consultation

Process stage
Indicative date
Closing date for submissions in response to this notice of first stage of consultation
6 December 2019
Publication of Draft Report and Determination
25 February 2020
Closing date for submissions in response to the Draft Report and Determination**
16 March 2020
Publication of Final Report and Determination
29 April 2020

** Submissions provided after the closing date will be considered on a case-by-case basis.

Consultation documents

AEMO invites comments on the proposed changes contained within the Notice of Second Stage of Consultation, MASS Draft Determination and revised MASS. These documents are provided in the merged pdf file below.

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