Today (Thu 13th September 2018) the AEMC made a final rule requiring the AEMO to establish a register of distributed energy resources in the NEM. The register is to include small-scale battery storage systems and rooftop solar.
The new register is to be in place by 1st December 2019. The transitional provisions, which will commence on 18 September 2018, include an obligation on AEMO to make and publish the first information guidelines for the register by 1 June 2019.
Further information is available here on the AEMC website.
This follows the draft rule published in June 2018.