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.

Release 1 January 2010	LAST UPDATED 06/01/2010

	Chapter		Title		Updated		Download
	Chapter 1		Introduction and Interpretation of the Rules		01 Jan 2010		473kB
	Chapter 2		Participation		01 Jan 2010		659kB
	Chapter 2		Participation (Tracked Change Version)		01 Jan 2010		580kB
	Appendix 2A		Technical requirements for registration as a market participant		01 Jan 2010		18kB
	Appendix 2B		Technical requirements for registration of facilities		01 Jan 2010		103kB
	Chapter 3		Administration, Supervision & Enforcement		01 Jan 2010		1.1MB
	Chapter 3		Administration, Supervision & Enforcement (Tracked Change Version)		01 Jan 2010		940kB
	Appendix 3A		Declaration of Nominee for Membership on the Rules Change Panel		01 Jan 2010		17kB
	Appendix 3B		Declaration For Appointment As Dispute Resolution Counsellor Or As A Member Of A Dispute Resolution And Compensation Panel		01 Jan 2010		17kB
	Appendix 3C		List of organisations eligible to submit a list or further lists of nominees for appointment to the Rules Change Panel		01 Jan 2010		13kB
	Appendix 3D		Declaration For Appointment As A Member of The Market Surveillance and Compliance Panel (New Appendix Arising from Approved Rule Change)		01 Jan 2010		19kB
	Chapter 4		Connection and Metering		01 Jan 2010		34kB
	Chapter 5		System Operation		01 Jan 2010		792kB
	Appendix 5A		Performance Standards for Ancillary Services		01 Jan 2010		65kB
	Appendix 5B		Performance Standards for System Operation		01 Jan 2010		24kB
	Appendix 5C		Outage Scheduling Information		01 Jan 2010		33kB
	Chapter 6		Market Operation		01 Jan 2010		505kB
	Appendix 6A		Market Operations Timetable		01 Jan 2010		65kB
	Appendix 6B		Input Data for the Market Clearing Engine		01 Jan 2010		33kB
	Appendix 6C		Output Data for the Market Clearing Engine		01 Jan 2010		32kB
	Appendix 6D		Market Clearing Formulation (Part 1)		01 Jan 2010		277kB
	Appendix 6D		Market Clearing Formulation (Part 2)		01 Jan 2010		340kB
	Appendix 6E		Standing Capability Data		01 Jan 2010		29kB
	Appendix 6F		Content of Offers		01 Jan 2010		13kB
	Appendix 6G		Dispatch Related Data		01 Jan 2010		38kB
	Appendix 6H		Advisory Notices		01 Jan 2010		23kB
	Appendix 6I		Compensation in the Event of Load Shedding		01 Jan 2010		40kB
	Appendix 6J		Price Limits and Constraint Violation Penalties		01 Jan 2010		47kB
	Chapter 7		Settlement		01 Jan 2010		607kB
	Appendix 7A		Calculation of Reserve Responsibility Shares		01 Jan 2010		98kB
	Appendix 7B		Process for Settlement Adjustments for Metering Errors		01 Jan 2010		120kB
	Chapter 8		Definitions		01 Jan 2010		296kB