Balancing Market Modification

Balancing Market Modifications

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Mod ID	Title	Mod Status	Stage	Section Affected	Effective Date	Publication Date
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		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		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		31/10/2024
SPX_02_24	SDAC Removal of Second Auction Process SPX_02_24SDACRemovalofSecondAuctionProcessv1.1 2024MayExchangeCommittee-SupportingSlides SPX_02_24-SubmissionReport SPX_02_24RADecisionLetter.pdf	RA Decision: Approved (Not Vetoed)	Closed	Operating Procedure Appendix A, Operating Procedure Section B, Operating Procedure Section E, Rules Section F	29/01/2025	25/04/2024
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		24/04/2024
SPX_05_23	Greenlink Interconnector Implementation SPX_05_23GreenlinkInterconnectorImplementation ExchangeCommitteeMeeting12-SupportingSlides SPX_05_23-SubmissionReport SPX0523-DecisionLetter	SEMOpx Decision: Approved	Closed	Operating Procedure Section A	06/02/2024	17/10/2023
SPX_04_23	Increase in the Minimum Price Threshold for the 2nd Auction Trigger SPX_04_23IncreaseintheMinimumPriceThresholdforthe2ndAuctionTrigger SPX_04_23IncreaseintheMinimumPriceThresholdforthe2ndAuctionTriggerv2.0 SPX_04_23-SubmissionReport SPX0423SEMOpxDecision	SEMOpx Decision: Approved	Closed	Operating Procedure Appendix A	15/06/2023	07/06/2023
SPX_03_23	Inclusion of HMMCP Methodology for Intraday Actions SPX_03_23ExplanatoryNoteonSEMIntradayHMMCPMethodologyUPDATED SPX_03_23InclusionofHMMCPMethodologyforIntradayAuctions SPX_03_23-SEMIntradayHMMCPMethodology SPX0323DecisionLetter SPX_03_23-SubmissionReport	SEMOpx Decision: Approved	Closed	Operating Procedure Appendix A	01/09/2023	24/04/2023
SPX_02_23	Recommendation Reporting Timeline SPX_02_23-RecommendationReportingTimeline SPX0223DecisionLetter SPX_02_23-SubmissionReport	SEMOpx Decision: Approved	Closed	Exchange Committee Procedures	06/06/2023	24/04/2023
SPX_01_23	Member Alternate Position SPX_01_23-MemberAlternatePosition SEMOpx-Exchange-Committee-Membership-Application-and-UndertakinglegaldraftingchangesSPX_01_23 RADecisionletterforSPX_01_23 SPX_01_23-SubmissionReport	RA Decision: Approved (Not Vetoed)	Closed	Rules Section B	26/07/2023	24/04/2023
SPX_07_22	Increase in SDAC Second Auction Maximum Price Threshold SPX_07_22IncreaseinSDACSecondAuctionMaximumPriceThreshold SEMOpxCommitteeMeeting11-Presentation SPX0722DecisionLetter	SEMOpx Decision: Approved	Closed	Operating Procedure Appendix A	07/12/2022	17/11/2022
SPX_06_22	IDA Full Decoupling Scenarios Changes SPX_06_22IDAFullDecouplingScenariosChanges SEMOpx-Operating-Procedures_IDADecouplingchanges SEMOpx-Operating-Procedures-Glossary SPX_06_22IDAFullDecouplingScenariosChanges-DecisionLetter SPX_06_22SEMOpxOperatingProceduresGlossarytrackedchanges SPX_06_22SEMOpx-Operating-Procedurestrackedchanges	SEMOpx Decision: Approved	Closed	Operating Procedure Section E	25/01/2023	13/10/2022
SPX_05_22	Increase in Max Day-Ahead Auction Price SPX_05_22IncreaseinMaxDay-AheadAuctionPrice(Sept2022)	Withdrawn	Closed	Operating Procedure Appendix A		25/08/2022
SPX_04_22	Increase in Max Day-Ahead Auction Price SPX_04_22IncreaseinMaxDay-AheadAuctionPrice SPX_04_22 Increase in Max Day-Ahead Auction Price	SEMOpx Decision: Approved	Closed	Operating Procedure Appendix A	03/06/2022	27/04/2022
SPX_03_22	DAM Decoupling Deadline Changes SPX_03_22DAMDecouplingDeadlineChanges SPX_03_22 DAM Decoupling Deadline Changes	SEMOpx Decision: Approved	Closed	Operating Procedure Section E	08/06/2022	27/04/2022
SPX_02_22	Scalable Complex Orders to replace Complex Orders SPX_02_22ScalableComplexOrderstoReplaceComplexOrders SPX_02_22LegalDrafting-OperatingProcedures SPX_02_22Legaldrafting-OperatingProceduresGlossary SPXMod_SCOtoReplaceCOv2.0 SEMOpxOPGlossary_Trackedchanges_(Revised_v2.0) SEMOpxOperatingProcedures_TrackedChanges_(Revised_v2.0) SPX_02_22ScalableComplexordertoreplaceComplexOrders-DecisionLetter	SEMOpx Decision: Approved	Closed	Operating Procedure Appendix A	25/01/2023	27/04/2022
SPX_01_22	Trading on Behalf Extension to IDAs SPX_01_22TradingonBehalfExtensiontoIDAs SPX_01_22 Trading on Behalf Extension to IDAs	SEMOpx Decision: Approved	Closed	Operating Procedure Section G	03/06/2022	27/04/2022
SPX_03_21	Updates to SEMOpx Operating Procedures as a result of an increase in the Maximum Intraday Auction Price SPX_03_21IncreaseinMaxIntradayAuctionPrice SPX_03_21IncreaseinMaxIntradayAuctionPricev2.0 SPX_03_21SubmissionReport SPX_03_21SubmissionReport SPX_03_21DecisionLetter	SEMOpx Decision: Approved	Closed	Operating Procedure Appendix A	15/12/2021	22/10/2021
SPX_02_21	Exchange rate for the SEMOpx fees SPX_02_21-ExchangeRateforSEMOpxFees SPX_02_21SubmissionReport SPX_02_21DecisionLetter	SEMOpx Decision: Approved	Closed	Operating Procedure Section F	01/12/2021	19/10/2021
SPX_01_21	Updates to SEMOpx Operating Procedures as a result of UK-EU TCA SEMOpx-Operating-Procedures-Final UpdatestoSEMOpxOperatingProceduresasaresultofUK-EUTCA SPX_01_21DecisionLetter	SEMOpx Decision: Approved	Closed	Operating Procedure Glossary	23/05/2021	29/04/2021
SPX_04_20	Operational Timings Amendment in MRC Auction SPX_04_20DecisionLetter SPXMod_04_20OperationalTimingsAmendmentinMRCAuction(Final) SEMOpx-Operating-Procedures-UpdatesforMRCtimingchanges	SEMOpx Decision: Approved	Closed	Operating Procedure Section E	17/06/2021	15/07/2020
SPX_03_20	Complex Orders Inclusion in Intraday Auctions SPXMod_03_20ComplexOrdersInclusioninIntradayAuctions SPX_03_20legaldrafting1-SEMOpxOperatingProcedures SPX_03_20legaldrafting2-SEMOPxProceduresGlossary SEMOpxSPX_03_20-DecisionLetter	SEMOpx Decision: Approved	Closed	Operating Procedure Glossary	01/10/2020	08/04/2020
SPX_02_20	Amendment to publication schedule of ex-ante auctions' Bid/Ask curves SPX_02_20Mod_AmendmenttoBidAskcurvepublicationdetailsv1.0 SPX_02_20AmendmenttoBidAskcurvepublicationdetailsv2.2 SPX_02_20DecisionLetter SPX02_20SubmissionReport	SEMOpx Decision: Approved	Closed	Operating Procedure Section B	10/09/2021	28/04/2020
SPX_01_20	Enable Block Orders in the IDA Auctions SPX_01_20EnableBlockordersintheIDAauctions	Withdrawn	Closed	Operating Procedure Glossary		10/03/2020
SPX_04_18	SEMOpx DPUG SPX_04_18SEMOpxDataPublicationGuide SPX_04_18SubmissionReport SPX_04_18DecisionLetter	RA Decision: Approved (Not Vetoed)	Closed	Operating Procedure Section B	01/07/2019	08/01/2019
SPX_03_18	Rules Glossary Corrections SPX_03_18SEMOpxGlossaryCorrections SPX_03_18SEMOpxGlossaryCorrectionsv2 SPX_03_18SubmissionReport SPX_03_18DecisionLetter SPX_03_18SEMOpxGlossaryCorrectionsv2	RA Decision: Approved (Not Vetoed)	Closed	Rules Glossary	24/07/2019	15/11/2018
SPX_02_18	Change to the Definition of Matched, Matching and Match SPX_02_18SEMOpxDefinitionofMatched,MatchingandMatch SPX_02_18SubmissionReport SPX_02_18DecisionLetter	RA Decision: Approved (Not Vetoed)	Closed	Rules Glossary	01/07/2019	15/11/2018
SPX_01_18	Submission of Cross Zonal Capacities SPX_01_18CZCsubmission	Withdrawn	Closed	Operating Procedure Section A		15/11/2018
SPX_01_19	SEMOpx Data Publication Guide SPX_01_19SEMOpxDataPublicationGuide SPX_01_19SEMOpxDataPublicationGuidev2 SPX_01_19v2SubmissionReport SPX_01_19_SEMOpx_Decision	SEMOpx Decision: Approved	Closed	Operating Procedure Section G	05/08/2019	17/05/2019
MCF_07	Clearing House Actions to Minimise Exposures MCF_07ClearingHouseActionstoMinimiseExposures MCF_07CommentsandResponses MCF_07_18RADecision	RA Decision: Approved (Not Vetoed)	Closed	Operating Procedure Section B	20/05/2018	12/09/2018
MCF_06	Liability Terms MCF_06_18CommentsandResponses MCF_06_18_Liabilityterms MCF_06_18RADecision MCF_06_18RARequestFurtherWork	RA Decision: Approved (Not Vetoed)	Closed	Operating Procedure Section G	21/07/2018	12/09/2018
MCF_04	Market Coupling Facilitator MCF_004ResponsestoConsultation MCF_004_SummaryandRationaleofChangestoSEMOpxRules MCF_004_MarketCouplingFacilitatorRulesModForm_140318 MCF_04_18RADecision	RA Decision: Approved (Not Vetoed)	Closed		20/04/2018	12/09/2018
MCF_03	All Avenues for Cost Recovery MCF_03CommentsandResponses	Withdrawn	Closed			12/09/2018
MCF_02	Trading Halt if Clearing House Requests MCF_02CommentsandResponses MCF_02RADecision MCF_02TradingHaltifClearingHouseRequests	RA Decision: Approved (Not Vetoed)	Closed	Operating Procedure Section C	31/03/2017	12/09/2018
MCF_01	No Trading When Not Authorised Under TSC MCF_01CommentsandResponses MCF_01NoTradingwhennotAuthorisedunderTSC MCF_01RADecision	RA Decision: Approved (Not Vetoed)	Closed	Operating Procedure Section C	30/03/2017	12/09/2018