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 2008	LAST UPDATED 08/01/2008

	Chapter		Title		Updated		Download
	Chapter 1		Introduction and Interpretation of the Rules		01 Jan 2008		275kB
	Chapter 2		Participation		01 Jan 2008		335kB
	Appendix 2A		Technical requirements for registration as a market participant		01 Jan 2008		102kB
	Appendix 2B		Technical requirements for registration of facilities		01 Jan 2008		117kB
	Chapter 3		Administration, Supervision & Enforcement		01 Jul 2008		1.1MB
	Appendix 3A		Declaration of Nominee for Membership on the Rules Change Panel		01 Jan 2008		93kB
	Appendix 3B		Declaration for nomination on the membership on the Market Surveillance Panel, as Dispute Resolution Counsellor or as a person within the group that may be selected as a member of a Dispute Resolution Panel		01 Jan 2008		86kB
	Appendix 3C		List of organisations eligible to submit a list or further lists of nominees for appointment to the Rules Change Panel		01 Jan 2008		62kB
	Chapter 4		Connection and Metering		01 Jan 2008		114kB
	Chapter 5		System Operation		01 Apr 2008		380kB
	Appendix 5A		Performance Standards for Ancillary Services		01 Jan 2008		144kB
	Appendix 5B		Performance Standards for System Operation		01 Jan 2008		115kB
	Appendix 5C		Outage Scheduling Information		01 Jan 2008		108kB
	Chapter 6		Market Operation		01 Jan 2008		282kB
	Appendix 6A		Market Operations Timetable		01 Jan 2008		161kB
	Appendix 6B		Input Data for the Market Clearing Engine		01 Jan 2008		131kB
	Appendix 6C		Output Data for the Market Clearing Engine		01 Jan 2008		122kB
	Appendix 6D		Market Clearing Formulation (Part 1)		01 Jan 2008		314kB
	Appendix 6D		Market Clearing Formulation (Part 2)		01 Jan 2008		305kB
	Appendix 6E		Standing Capability Data		01 Jan 2008		129kB
	Appendix 6F		Content of Offers		01 Jan 2008		51kB
	Appendix 6G		Dispatch Related Data		01 Jan 2008		139kB
	Appendix 6H		Advisory Notices		01 Jan 2008		118kB
	Appendix 6I		Compensation in the Event of Load Shedding		01 Jan 2008		145kB
	Appendix 6J		Price Limits and Constraint Violation Penalties		01 Jan 2008		167kB
	Chapter 7		Settlement		01 Oct 2008		606kB
	Appendix 7A		Calculation of Reserve Responsibility Shares		01 Jan 2008		169kB
	Appendix 7B		Process for Settlement Adjustments for Metering Errors		01 Jan 2008		180kB
	Chapter 8		Definitions		01 Jan 2008		228kB