The AEMC has made its final determination for the Business Day Rule Change. This Rule Change amends the definition of business day in the Glossary of the National Electricity Rules (the Rules).

This Rule Change aligns the definition of business day in the Rules with the definition in the National Electricity Law (NEL). This will make clear that a day that is observed as a public holiday in each participating NEM jurisdiction (except the Commonwealth) will not be a business day under the Rules. A public holiday observed in one or more participating jurisdictions, but not all participating jurisdictions, will be a business day under the Rules. A public holiday will not have to observe the same event in each participating jurisdiction in order to be classified as a non-business day.

This Rule Change will provide regulatory certainty for the timing of the Registered participants' obligations, thereby minimising the risk of dispute. Minimising the risk of dispute has the potential for market participants to avoid financial costs that could ultimately be passed through to electricity customers through increased prices.

This Rule Change was considered under the expedited process as a non-controversial Rule Change.