The Market Liquidity Obligation (MLO) is a market making requirement designed to facilitate transparency and liquidity in the trading of electricity futures contracts relating to a forecast reliability gap. The MLO commences when the Retailer Reliability Obligation (RRO) is triggered and provides a source of qualifying contracts for liable entities to purchase to help meet their RRO contracting requirements.

Initial MLO generators and MLO groups were determined in transitional rules made up until 30 June 2021 to implement the RRO. Subsequent MLO determinations and variations are made by the AER in accordance with the MLO Guidelines.

RRO generator portal

To facilitate the development of the MLO register, the National Electricity Rules required the AER to publish a MLO information template by 31 October 2020. To streamline the information gathering process, the AER launched an online RRO Generator Portal to streamline the provision of generator information. The generator portal replaced the MLO information template that was published in October 2020.

Market Generators in the NEM with portfolios that included scheduled generating units received an email including an invitation to join the RRO Generator Portal in late 2020.

The National Electricity Rules required all Market Generators with scheduled generating units to provide the information outlined in the portal by 31 January 2021.

If you believe you should have access to the portal, please contact the RRO team. The AER has also published a guide to assist generators in using the online portal. Any questions about submitting information through the portal can be directed to the RRO team at RROataer [dot] gov [dot] au (RRO[at]aer[dot]gov[dot]au).

AER - RRO Generator Portal - User guide - December 2020

MLO register

The National Electricity Rules require the AER to develop and publish the MLO register by 31 May 2021. The MLO register replaces the deemed list of generators in the transitional rules, and outlines the MLO generators and MLO groups in participating NEM regions responsible for performing the obligation from 1 July 2021.

Market participants that have scheduled generating units in their portfolios are reminded of the requirement to update the information in the RRO portal in the event the details of their scheduled generating units change to ensure the MLO register remains accurate. This is necessary for all participants with scheduled generation, not only those existing MLO generators and MLO groups.

If you have any questions about the MLO register, please contact the RRO team at RROataer [dot] gov [dot] au (RRO[at]aer[dot]gov[dot]au).

MLO Register - November 2023

MLO Exchanges 

There are two exchanges on which MLO groups and MLO generators and liable entities can trade MLO products : the ASX24 and the FEX.