The Singapore Electricity Market Rules (Market Rules) govern wholesale operations of the NEMS.

Modifications to the Market Rules are updated on this website on a quarterly basis in April, July, October and January. In April, July and October, we update and publish individual chapters with modifications that come into effect on or before April, July and October respectively. In January, we publish a new release of the Market Rules (all chapters) dated January. This release includes all modifications that come into effect on or before January of the particular year.

Please note that modifications approved by the EMA but not yet in effect at the date of each quarterly update and/or annual release are not included. Depending on their nature, some modifications do not take effect immediately upon approval. To view these and other modifications approved by the EMA after each quarterly update and/or annual release, please click here.