Modifications Under Consideration | SEMOpx

Filter modifications by:

Mod ID:

Title:

Stage:

Status:

Section Affected:

Mod ID	Title	Mod Status	Stage	Section Affected	Effective Date	Publication Date
SPX_02_25	IDA1 and IDA2 Local Auction Cancellation Deadline SPX_02_25 IDA1 and IDA2 Local Auction Cancellation Deadline.pdf	New	Active	Operating Procedure Section E		08/10/2025
SPX_01_25	SDAC 60Min Harmonised Reference Price SPX_01_25 SDAC 60Min Harmonised Reference Price.pdf 8th May 2025 Exchange Committee - Supporting Slides.pdf SPX_01_25 Decision Letter.pdf	SEMOpx Decision: Approved	Active	Operating Procedure Appendix A	30/09/2025	24/04/2025
SPX_04_24	Housekeeping Modification Proposal related to 30 min MTU SPX_04_24Housekeepingmodificationproposalrelatedto30minMTU SEMOpxOperatingProceduresLegalDrafting-SPX_04_24.docx SPX_04_24-DecisionLetter.pdf	SEMOpx Decision: Approved	Active	Operating Procedure Appendix A, Operating Procedure Section A, Operating Procedure Section B, Operating Procedure Section C	30/09/2025	31/10/2024
SPX_03_24	Multiple Auction Trading System (MATS) Implementation SPX_03_24MultipleAuctionTradingSystem(MATS)Implementation(2) SEMOpxOperatingProcedure(MATS)-LegalDrafting SEMOpx-Rules-Glossary(MATS)-LegalDrafting SEMOpx-Operating-Procedures-Glossary(MATS)-LegalDrafting SPX_03_24-RADecisionLetter.pdf	RA Decision: Approved (Not Vetoed)	Active	Operating Procedure Appendix A, Operating Procedure Glossary, Operating Procedure Section A, Operating Procedure Section B, Operating Procedure Section C, Rules Glossary	28/08/2025	31/10/2024
SPX_01_24	30 Minute MTU Implementation in the Day-Ahead Market SPX_01_2430MinuteMTUImplementationintheDay-AheadMarket 2024MayExchangeCommittee-SupportingSlides SPX_01_24-SubmissionReport SPX_01_24DecisionLetter	SEMOpx Decision: Approved	Active	Operating Procedure Appendix A	30/09/2025	24/04/2024