Capacity Market Modifications

Capacity Modifications Workshops consider any change to the Capacity Market Code. A Workshop is held every 2 months. Details of scheduled meetings can be found in the meetings calendar below.

Capacity Market Modifications Workshops

The Capacity Market Workshop forms part of the Capacity Market Modification process. The objective of this process is to progress Capacity Market Modification Proposals with a view to better facilitating the achievement by the Capacity Market Code of the Capacity Market Code Objectives.

Use the link below to see the full calendar of scheduled meetings. Each meeting event containts the relevant agenda and minutes.

See the meetings calendar

Capacity Market Workshops Schedule 2025

Mod ID	Title	Mod Status	Stage	Section Affected	Effective Date
CMC_12_24	Proportion of Delivered Capacity in respect of incremental New Capacity ProportionofDeliveredCapacityinrespectofincrementalNewCapacity.pdf CMC_12_24-Presentation.pdf	In Consultation	Active	Section G
CMC_11_24	Implementation of Early Delivery Incentives according to SEMC Decision Paper SEM-24-037 CMC_11_24ImplementationofEarlyDeliveryIncentivesaccordingtoSEMCDecisionPaperSEM-24-037.pdf CMC_11_24Presentation.pdf CMC_11_24ImplementationofEarlyDeliveryIncentivesaccordingtoSEMCDecisionPaperSEM-24-037V2.pdf SEM-24-063-CMCWorkshop37BDecisionpaper.pdf SEM-24-063LegalDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Appendix F,Glossary,Section D,Section F	17/09/2024
CMC_10_24	Introduction of Intermediate Length Contracts CMC_10_24IntroductionofIntermediateLengthContracts.pdf CMC_10_24Presentation.pdf CMC_10_24IntroductionofIntermediateLengthContractsV2.pdf SEM-24-063-CMCWorkshop37BDecisionpaper.pdf SEM-24-063LegalDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Glossary,Section D,Section E,Section F,Section G,Section J,Section M	17/09/2024
CMC_09_24	Amendments to J.5.7 and J.5.8 CMC_09_24AmendmentstoJ.5.7andJ.5.8.pdf SEM-24-070CMCModsWorkshop37decision.pdf SEM-24-070AppendixA-CMCModsWorkshop37ApprovedModificationsdrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section J	27/09/2024
CMC_08_24	Widening of Longstop Extension Process to Awarded Capacity for 2023-24 Auction CMC_08_24WideningofLongstopExtensionProcesstoAwardedCapacityfor2023-24Auction.pdf SEM-24-070CMCModsWorkshop37decision.pdf SEM-24-070AppendixA-CMCModsWorkshop37ApprovedModificationsdrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section J	27/09/2024
CMC_07_24	Treatment of Capacity Contracts of Varying Duration in Constrained Auction Solution CMC_07_24TreatmentofCapacityContractsofVaryingDurationinConstrainedAuctionSolution.pdf CMC_07_24TreatmentofCapacityContractsofVaryingDurationinConstrainedAuctionSolutionv2.docx SEM-24-070CMCModsWorkshop37decision.pdf	RA Decision: Further review required	Active	Section F
CMC_06_24	Performance Securities for Extended Projects CMC_06_24PerformancesecuritiesforExtendedProjects.pdf CMC_06_24PerformaceSecurityforExtendedProjects-Slides.pdf	In Consultation	Active	Section J
CMC_05_24	Amendment to J.6.1.6 to recognise extensions granted under SEM-23-101 and SEM-23-108 CMC_05_24AmendmenttoJ.6.1.6torecogniseextensionsgrantedunderSEM-23-101andSEM-23-108.pdf SEM-24-062Workshop36RADecisionLetter.pdf CMC_05_24AppendixAlegaldraftingforpublication(1).pdf	RA Decision: Approved (Not Vetoed)	Closed	Section J	01/10/2024
CMC_04_24	Recovery of Net Present Value Lost as a Result of No-Fault Delays to New Capacity CMC_04_24RecoveryofNetPresentValueLostasaResultofNo-FaultDelaystoNewCapacity.pdf CMC_04_24-Presentation.pdf	In Consultation	Active	Glossary,Section J
CMC_03_24	Enduring Mechanism for Indexation based on GB Model CMC_03_24-Presentation.pdf CMC_03_24EnduringMechanismforIndexationbasedonGBModelv2.pdf SEM-24-062Workshop36RADecisionLetter.pdf	RA Decision: Recommended for Rejection	Closed	Section F	03/10/2024
CMC_02_24	Modification to the Performance Security Requirement CMC_02_24-Presentation.pdf CMC_02_24ModificationtothePerformanceSecurityRequirement.pdf	In Consultation	Active	Section J
CMC_01_24	Amendment to criteria to achieving Substantial Financial Milestone CMC_01_24AmendmenttocriteriatoachievingSubstantialFinancialMilestone.pdf CMC_01_24-AmendmenttocriteriatoachievingSFCCompletionMilestone-KilshaneEnergy.pdf	Withdrawn	Closed	Section J
CMC_25_23	Market Readiness Certification CMC_25_23MarketReadinessCertification.pdf CMC_25_23DecisionLetter.pdf CMC_25_23Modificationlegaldrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Glossary,Section C,Section G,Section J	12/01/2024
CMC_24_23	Revision of the Exception Application Timelines CMC_24_23RevisionoftheExceptionApplicationTimelines.pdf CMC_24_23-CapacityMarketCodeTrackedChanges.pdf CMC_24_23-AgreedProcedure3QualificationandAuctionProcessTrackedchanges.pdf CMC_24_23-Presentation.pdf SEM-24-030CMC_24_23DecisionPaper.pdf	RA Decision: Recommended for Rejection	Closed	Agreed Procedure 3,Glossary,Section J
CMC_23_23	Mitigation of Impact on Participants relating to System Operator Grid Connection delays CMC_23_23MitigationofImpactonParticipantsrelatingtoSystemOperatorGridConnectiondelays.pdf CMC_23_23MitigationofImpactonParticipantsrelatingtoElectricitySystemOperatorGridConnectiondelaysslides.pdf SEM-23-101DelayModDecisionpaper.pdf SEM-23-108RevisedLegalDrating.pdf	RA Decision: Approved (Not Vetoed)	Closed	Glossary,Section J	01/01/2024
CMC_22_23	Indexation of Capacity Payment Price for inflation CMC_22_23-IndexationofCapacityPaymentPriceforInflation.pdf Slides-CMC_22_23IndexationofCapacityPaymentPriceforInflation.pdf CMC_22_23CopyofIndexedInflationtwoworkedexamples(finalexample).xlsx SEM-24-061CMC_22_23decisionpaperforpublication011024pdf.pdf	Recommended For Rejection	Closed	Appendix F,Glossary,Section F	01/10/2024
CMC_21_23	Minimum Completion on Receipt of Interim Operational Notification CMC_21_23-MinimumCompletiononReceiptofInterimOperationalNotification.pdf CMC_21_23-MinimumCompletiononReceiptofIONslides.pdf SEM-24-029CMCModsWS33DecisionPaper.pdf	RA Decision: Recommended for Rejection	Closed	Section C,Section G,Section J
CMC_20_23	Amendment to Timing of Opt Out Notifications CMC_20_23AmendmenttoTimingofOptOutNotifications.pdf CMC_20_23-AmendmenttoTimingofOptOutNotificationsslides.pdf SEM-24-029CMCModsWS33DecisionPaper.pdf	RA Decision: Recommended for Rejection	Closed	Section E
CMC_19_23	Modification to implement the SEMC Decision set out in SEM-23-038 and SEM-23-045 CMC_19_23ModificationtoImplementtheSEMCDecisionsetoutinSEM-23-038andSEM-23-045.pdf SEM-23-102-IndexationModDecisiononCMC_19_23.pdf AppendixA-ApprovedRAIndexationModificationdrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Glossary,Section E,Section F	12/12/2023
CMC_18_23	Amendment to Definition of Third Party Extension Period CMC_18_23AmendmenttodefinitionofThirdPartyExtensionPeriod.pdf CMC_18_23-AmendmenttodefinitionofThirdPartyExtensionPeriod.pdf SEM-24-015CMCModsWG33DecisionPaperonCMC_18_23.pdf AppendixA-ApprovedRAIndexationModificationdraftingforCMC_18_23.pdf	RA Decision: Approved (Not Vetoed)	Closed	Glossary	16/02/2024
CMC_17_23	Updates to LCC Areas CMC_17_23UpdatestoLCCAreas.pdf SEM-23-061CMCModsWG32DecisionPaperCMC_17_23.pdf SEM-23-061AppendixB-ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section C,Section D	03/10/2023
CMC_16_23	Extension to New Capacity Impacted by Indexation CMC_16_23ExtensiontoNewCapacityImpactedbyIndexation.pdf CMC_16_23-Presentation.pdf CMC_16_23ExtensiontoNewCapacityImpactedbyIndexation-UpdatedDrafting.docx UpdatedDraftingforCMC_15_23andCMC_16_23-EPUKI.docx SEM-23-101DelayModDecisionpaper.pdf SEM-23-108RevisedLegalDrating.pdf	RA Decision: Approved (Not Vetoed)	Closed	Glossary,Section J	01/01/2024
CMC_15_23	Amendment to Performance Securities for Extended Projects CMC_15_23AmendmenttoPerformanceSecuritiesforExtendedProjects.pdf CMC_15_23-Presentation.pdf CMC_15_23-AmendmenttoPerformanceSecuritiesforExtendedProjects-UpdatedDrafting.docx UpdatedDraftingforCMC_15_23andCMC_16_23-EPUKI.docx SEM-23-069_CMC-15-23DecisionPaper-CMC_15_23.pdf SEM-23-069AppendixB-ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section J	08/09/2023
CMC_14_23	LCC Violation Criteria CMC_14_23-LCCViolationCriteria.pdf SEM-23-079CMC_14_23WS31DecisionLetter.pdf SEM-23-079CMC_14_23AppendixA-ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Glossary,Section F	03/10/2023
CMC_13_23	Min Completion Prior to Long Stop Date CMC_13_23-AchievingMinimumCompletionpriortotheLongStopDate.pdf SEM-23-100CMC_13_23WS31DecisionLetter.pdf SEM-23-100CMC_13_23AppendixA-ApprovedTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section G,Section J	20/12/2023
CMC_12_23	Facilitation of Unit Specific Price Caps for Existing Capacity in Excess of the Auction Price Cap CMC_12_23-USPCinExcessofAPC1.2.pdf CMC_12_23-USPCinExcessofAPC1slides.pdf SEM-23-096CMC_12_23WS31Decision.pdf	RA Decision: Recommended for Rejection	Closed	Glossary,Section J
CMC_11_23	Amendment to Drafting Introduced Under Modification CMC_15_22 CMC_11_23-AmendmenttoDraftingIntroducedUnderCMC_15_22slides.pdf CMC_11_23AmendmenttoDraftingIntroducedUnderModificationCMC_15_22.pdf SEM-23-087CMC_11_23AppendixA-ApprovedModTextDrafting.pdf SEM-23-087CMC_11_23WS31DecisionPaper.pdf	RA Decision: Approved (Not Vetoed)	Closed	Glossary,Section J	22/11/2023
CMC_10_23	Mitigation of Impact on Participants relating to 3rd Party Gas Connection delays CMC_10_23MitigationofimpactonParticipantsre3rdPartyGasConnectiondelays.pdf CMC10_23MitigationofImpactonParticipantsre3rdPartyGasConnectiondelays-presentation.pdf SEM-23-101DelayModDecisionpaper.pdf SEM-23-108RevisedLegalDrating.pdf	RA Decision: Approved (Not Vetoed)	Closed	Glossary,Section J	01/01/2024
CMC_09_23	Removal of Section J.6.1.6 (1) CMC_09_23RemovalofSectionJ.6.1.6(1).pdf CMC_09_23RemovalofSectionJ.6.1.6slides.pdf SEM-23-101DelayModDecisionpaper.pdf SEM-23-108RevisedLegalDrating.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section J	01/01/2024
CMC_08_23	Typographical Correction Capacity Aggregation Threshold CMC_08_23TypographicalCorrectionCapacityAggregationThreshold..pdf SEM-23-095CMC_08_23WS30DecisionPaper.pdf SEM-23-095CMC_08_23AppendixA-ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed		11/12/2023
CMC_07_23	Special Application of ISTA CMC_07_23SpecialApplicationofISTA.pdf SEM-23-077CMC_07_23WS30Decision.pdf SEM-23-077CMC_07_23AppendixA-ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section M	02/10/2023
CMC_06_23	Second ARHL Modification to Complete SEM-22-044 CMC_06_23SecondARHLModificationtoCompleteSEM-22-044.pdf SEM-24-002CMC_06_23WS30DecisionLetter.pdf SEM-24-002CMC_06_23AppendixA-ApprovedModificationTextDrafting_2.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section E,Section G,Section I	11/01/2024
CMC_05_23	Resolving inconsistency in definition of Existing Capacity Arising from CMC_11_22 CMC_05_23ARHLIssueIdentifiedinCMDRBDecision.pdf SEM-24-006CMC_05_23WS30Decision.pdf SEM-24-006CMC_05_23AppendixA-ApprovedModificationTextDraft.pdf	RA Decision: Approved (Not Vetoed)	Closed		08/02/2024
CMC_04_23	Introduction of Remedial Action for Unforeseeable Delays Due To Extraordinary Supply Chain Impacts CMC_04_23Introductionofremedialactionforunforeseeabledelaysduetoextraordinarysupplychainimpacts.pdf CMC_04_23Presentation.pdf SEM-23-101DelayModDecisionpaper.pdf SEM-23-101DelayModDecisionpaper.pdf SEM-23-108RevisedLegalDrating.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section E,Section J	01/01/2024
CMC_03_23	Amendment of Long Stop Date for T-1 Capacity Auction CMC_03_23-AmendmentofLong-StopDateforT-1CapacityAuction.pdf CMC_03_23-AmendmenttoLongStopDateforT-1CapacityAuction.pdf SEM-23-046CMCModsWG29DecisionPaper-CMC_03_23.pdf SEM-23-046-AppendixB-ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section J	30/06/2023
CMC_02_23	Amendment of Milestones Associated with Substantial Financial Completion CMC_02_23-AmendmentofMilestonesAssociatedwithSubstantialFinancialCompletion.pdf CMC_02_23-AmendmenttoMilestonesAssociatedwithSubstantialFinancialCompletion.pdf	Withdrawn	Closed	Section J
CMC_01_23	Amendment to Substantial Completion Drafting CMC_01_23-AmendmenttoSubstantialCompletionDrafting.pdf CMC_01_23-AmendmenttoSubstantialCompletionDrafting.pdf CMC_01_23-AmendmenttoSubstantialCompletionDraftingproposalform.pdf SEM-23-101DelayModDecisionpaper.pdf SEM-23-108RevisedLegalDrating.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section J	01/01/2024
CMC_16_22	Secondary Trading Delays to Awarded New Capacity CMC_16_22SecondaryTradingdelaystoAwardedNewCapacity.pdf CMC_16_22v2SecondaryTradingdelaystoAwardedNewCapacity.pdf	Withdrawn	Closed	Section E,Section J,Section M
CMC_15_22	Introduction of New Remedial Action to enable extensions due to planning and Permitting Delays CMC_15_22IntroductionofNewRemedialActiontoEnableExtensionsduetoPlanningandPermittingDelays.pdf CMC_15_22-CapacityMarketWorkshopSlides.pdf CMC_15_22-CapacityMarketWorkshopSlides.pdf UpdatedCMC_15_22-NewRemedialActiontoEnableExtensionsduetoPlanningandPermittingDelays.pdf SEM-23-001CMCUrgentModsWG28DecisionPaper.pdf SEM-23-001AppendixB-ApprovedModificationTextDrafting.docx	RA Decision: Approved (Not Vetoed)	Closed	Section J	20/01/2023
CMC_14_22	Modification re-Mitigation of impact of Third-Party delays on Participants and extension of Support term CMC_14_22_ModificationreMitigationofImpactof3rdPartyDelaysonParticipantsandExtensionofSupportterm_update.pdf CMC_14_22Modificationre-MitigationofimpactofThird-PartyDelaysonParticipantsandextensionofSupportterm.pdf CMC_14_22_ModificationreMitigationofImpactof3rdPartyDelaysonParticipantsandExtensionofSupportterm_update.pdf SEM-23-001CMCUrgentModsWG28DecisionPaper.pdf	Withdrawn	Closed
CMC_13_22	Judicial Review Remedial Action CMC_13_22-Modification-Proposal-JudicialReviewRemedialActionV2.pdf CMC_13_22JudicialReviewRemedialAction.pdf SEM-23-001CMCUrgentModsWG28DecisionPaper.pdf SEM-23-001AppendixB-ApprovedModificationTextDrafting.docx	RA Decision: Approved (Not Vetoed)	Closed	Section J	20/01/2023
CMC_12_22	Remedial Action in the event of planning application to a project that qualifies under a Direction CMC_12_22RemedialActionintheeventofplanningapplicationdelaytoaprojectthatqualifiesunderaDirection.pdf CMC_12_22-PlanningDelaysPresentationv2.pdf SEM-23-001CMCUrgentModsWG28DecisionPaper.pdf SEM-23-001AppendixB-ApprovedModificationTextDrafting.docx	RA Decision: Approved (Not Vetoed)	Closed	Section J	20/01/2023
CMC_11_22	De-rating for Annual Run Hours Limits CMC_11_22ARHLDerating.pdf SEM-22-063CMC_11_22ModsWG26bDecisionPaper.pdf SEM-22-063CMC_11_22ModsWG26bAppendixBLegalDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section C,Section D,Section E,Section G,Section I	05/09/2022
CMC_10_22	Introduction of New Remedial Action in the event of Third Party Delays CMC_10_22IntroductionofNewRemedialActionintheeventofThirdPartyDelays.pdf CMC_10_22-ThirdPartyDelaysPresentation-v2.pdf SEM-22-074CMCModsWG26DecisionPaper.pdf	RA Decision: Recommended for Rejection	Closed	Section J	14/10/2022
CMC_09_22	Secondary Trade Approval Notification CMC_09_22SecondaryTradeapprovalnotification.pdf CMCModPresentation-CMC_09_22.pdf SEM-22-066CMCModsWG25DecisionPaper.pdf SEM-22-066AppendixD-ApprovedModificationTextDrafting-CMC_09_22.pdf	RA Decision: Approved (Not Vetoed)	Active	Section M
CMC_08_22	Local Capacity Constraints Maximum Quantities CMC_08_22-LocationalCapacityConstraintMaximumQuantities.pdf SEM-22-066CMCModsWG25DecisionPaper.pdf SEM-22-066AppendixC-ApprovedModificationTextDrafting-CMC_08_22.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section C,Section F	30/09/2022
CMC_07_22	Joint Market Registration Variation in Mix CMC_07_22JointMarketRegistrationVariationinMix.pdf CMC_07_22Presentation.pdf SEM-22-066CMCModsWG25DecisionPaper.pdf	RA Decision: Recommended for Rejection	Closed	Section G,Section I	30/09/2022
CMC_06_22	New Interdependent Combined Units CMC_06_22NewInterdependentCombinedUnits.pdf CMC_06_22Slides.pdf SEM-22-066CMCModsWG25DecisionPaper.pdf	Withdrawn	Closed	Section E,Section F
CMC_05_22	Housekeeping Mod to Update Overlap between CMC_03_21 and CMC_04_21 CMC_05_22Housekeeping-Correctingoverlapof03_21and04_21.pdf SEM-22-033AppendixC-ApprovedModificationTextDraftingCMC_05_22.pdf SEM-22-033WG25ConsultationPaper.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section J	01/07/2022
CMC_04_22	New Reference Rates for Default Interest CMC_04_22NewReferenceRatesforDefaultInterest.pdf SEM-22-066CMCModsWG25DecisionPaper.pdf SEM-22-066AppendixB-ApprovedModificationTextDrafting-CMC_04_22.pdf	RA Decision: Approved (Not Vetoed)	Closed		30/09/2022
CMC_03_22	Transparency on Publication of Qualification Results CMC_03_22-TransparencyonPublicationofQualificationResults.pdf SEM-22-028CMCModsWG23DecisionPaper.pdf LegalDraftingtoCMC_02_22CMC_03_22.pdf	RA Decision: Approved (Revised Legal Drafting)	Closed	Section E	08/07/2022
CMC_02_22	Timely Publication of FAIP CMC_02_22-TimelyPublicationofFAIP.pdf SEM-22-028CMCModsWG23DecisionPaper.pdf LegalDraftingtoCMC_02_22CMC_03_22.pdf	RA Decision: Approved (Revised Legal Drafting)	Closed	Section F	08/07/2022
CMC_01_22	New Interdependent Combined Units CMC_01_22NewInterdependentCombinedUnits.pdf CMC_01_22InterdependentCombinedUnitsv2.pdf SEM-22-028CMCModsWG23DecisionPaper.pdf LegalDraftingtoCMC_01_22(v2).pdf	RA Decision: Approved (Revised Legal Drafting)	Closed	Section E	08/07/2022
CMC_12_21	Modification to the methodology for calculating the De-Rated Grid Code Commissioned Capacity CMC_12_21GrossDeratingFactorModProposal.pdf CMC_12_21Presentation.pdf SEM-021-080CMCModsWG20DecisionPaper.pdf CMC_12_21ApprovedModificationTextDrafting.pdf CMC_12_21UpdatedApprovedModificationTextDrafting.pdf CMCModsWG20DecisionPaper-updated.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section G	19/11/2021
CMC_11_21	Extending Current ASTN Form CMC_11_21ExtendingCurrentASTNForm.pdf CMC_11_21ExtendingCurrentASTNFormPresentation.pdf CMC_11_21Modification-Proposal-ExtendingCurrentASTNFormversion2.0.pdf SEM-021-077CMCModsWG19DecisionPaper.pdf CMC_11_21ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Active	Section M
CMC_10_21	Modification to the provisions for Market Registration of Demand Side Units CMC_10_21ModificationtotheprovisionsforMarketRegistrationofDemandSideUnitsDRAI.pdf SEM-021-077CMCModsWG19DecisionPaper.pdf	Withdrawn	Closed	Section E,Section G,Section I
CMC_09_21	Timeframe to consider SFC Extensions CMC_09_21TimeframetoconsiderSFCExtensions.pdf CMCWorkshop19-RAsSlides.pdf SEM-021-077CMCModsWG19DecisionPaper.pdf CMC_09_21ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section J	21/09/2021
CMC_08_21	Ex-post Verification of Compliance with the CO2 Limits CMC_08_21Ex-postVerificationofCompliancewiththeCO2Limits.pdf CMCWorkshop19-RAsSlides.pdf SEM-021-077CMCModsWG19DecisionPaper.pdf CMC_08_21ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section I	02/11/2021
CMC_07_21	E.4 Application for Qualification Update CMC_07_21E.4ApplicationforQualificationUpdate.pdf CMCWorkshop19-RAsSlides.pdf SEM-021-077CMCModsWG19DecisionPaper.pdf CMC_07_21ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section E	02/11/2021
CMC_06_21	NIRO and DSU CMC_06_21NIROandDSU.pdf CMCWorkshop19-RAsSlides.pdf SEM-021-077CMCModsWG19DecisionPaper.pdf CMC_06_21ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section E,Section I	21/09/2021
CMC_05_21	Substitution of Candidate Units CMC_05_21SubstitutionofCandidateUnits.pdf CMCWorkshop19-RAsSlides.pdf SEM-021-077CMCModsWG19DecisionPaper.pdf	RA Decision: Recommended for Rejection	Closed	Section J
CMC_04_21	Verification Requirements for Implementation Plan Milestones CMC_04_21-VerificationRequirementsforImplementationPlanMilestones.pdf SEM-021-048CMCModsWG18DecisionPaper.pdf CMC_04_21ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section J	14/07/2021
CMC_03_21	Modification to the provisions for Substantial Financial Completion CMC_03_21ModificationtotheprovisionsforSubstantialFinancialCompletion.pdf CMC_03_21SubstantialFinancialCompletionModification-Presentation.pdf CMC_03_21SubstantialFinancialCompletionModProposalv2.pdf SEM-021-048CMCModsWG18DecisionPaper.pdf CMC_03_21SubstantialFinancialCompletionModProposal(v3).pdf CMC_03_21SubstantialFinancialCompletionModification-Presentation.pdf SEM-021-080CMCModsWG20DecisionPaper.pdf CMC_03_21v3ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section J	19/11/2021
CMC_02_21	Amendment to Capacity Market Code Modifications Workshop Agenda Timeline CMC_02_21ModificationProposal-AgendaTimeline.pdf SEM-021-048CMCModsWG18DecisionPaper.pdf CMC_02_21ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section B	14/07/2021
CMC_01_21	Amendment relating to the provision of the CAM Report following a Capacity Auction CMC_01_21AmendmentrelatingtoprovisionoftheCAMReportfollowingAuction.pdf SEM-021-048CMCModsWG18DecisionPaper.pdf CMC_01_21ApprovedModificationTextDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section B	14/07/2021
CMC_12_20	Fix to Seller Limit in CMC_09_19 CMC_12_20-FixtoSellerLimitinCMC_09_19.pdf	Withdrawn	Closed	Section M
CMC_11_20	Providing greater flexibility for the current interim Secondary Trading Notification (ISTN) process CMC_11_20ProvidinggreaterflexibilityforthecurrentInterimSecondaryTradingNotification(ISTN)process.pdf CMC_11_20-Presentation.pdf CMC_11_20-ProvidinggreaterflexibilityforthecurrentInterimSecondaryTradingNotification(ISTN)process(V2).pdf SEM-020-069CMCModsWG14DecisionPaper2.0.pdf SEM-020-069AppendixDCMC_11_20ApprovedModificationTextDrafting.docx	RA Decision: Approved (Not Vetoed)	Closed	Section M	26/10/2020
CMC_10_20	Change to determinations made in F.4.1.1 CMC_10_20-ChangeindeterminationsmadeinF.4.1.1.pdf CMC_10_20-F_4_1Change.pdf SEM-020-069CMCModsWG14DecisionPaper2.0.pdf SEM-020-069AppendixCCMC_10_20ApprovedModificationTextDrafting.docx	RA Decision: Approved (Not Vetoed)	Closed	Section F	26/10/2020
CMC_09_20	Modification to the Long Stop Date for the CY2020 / 21 T-1 Capacity Auction CMC_09_20ModificationtotheLongStopDatefortheCY202021T-1CapacityAuctionv1.1.pdf CMC_09_20LongStopExtensionforCY2020_21T-1Presentation.pdf SEM-20-055CMCModsWG13DecisionPaper.pdf SEM-20-055AppendixC-CMCApprovedDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section M	28/08/2020
CMC_09_19B	Addendum SEM-20-077AddendumtoSEM-20-064(1).pdf SEM-20-077aAppendixA-ApprovedTextDraftingUpdatedtoCorrectM.11.6...(1).pdf	RA Decision: Approved (Not Vetoed)	Closed	Section M	13/11/2020
CMC_08_20	Change Awarded Existing Capacity to Awarded New Capacity CMC_08_20-ChangeAwardedExistingCapacitytoAwardedNewCapacity.docx CMC_08_20PresentationWorkshop12.pdf SEM-020-064CMCModsWG12CMC_09_1907_2008_20DecisionPaper.pdf	RA Decision: Recommended for Rejection	Closed	Section I
CMC_07_20	Change in Technology Class CMC_07_20-ChangeinTechnologyClass.docx CMC_07_20PresentationWorkshop12.pdf SEM-020-064CMCModsWG12CMC_09_1907_2008_20DecisionPaper.pdf SEM-21-002CMCModsWG12DecisionPaper.pdf SEM-21-002AppendixC-ApprovedModificationTextDrafting.docx	RA Decision: Approved (Not Vetoed)	Closed	Section C,Section G,Section J	18/01/2021
CMC_06_20	Combining Capacity Units into a Capacity Market Unit Proposed Changes CMC_06_20CombiningCapacityUnitsintoaCapacityMarketUnitProposedChanges.docx CMC0620--CombiningCandidateUnitsintoaCapacityMarketUnit.pdf SEM-20-039CMCModsWG12CMC_04CMC_06DecisionPaper.pdf	RA Decision: Recommended for Rejection	Closed	Section E
CMC_05_20	Implement amendments as required by the Clean Energy Package Regulation EU 2019 / 943 CMC_05_20ImplementamendmentsasrequiredbytheCleanEnergyPackageRegulationEU2019943.docx CMC_05_20Workshop-CEPemissionsmodificationFINAL.pdf SEM-20-026CMCModsWG12CMC_05_20DecisionPaper.pdf SEM-20-026(a)AppendixA-CMCApprovedDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section D,Section E,Section J	27/04/2020
CMC_04_20	Providing greater flexibility for New Capacity to combine candidate units into a single Capacity Market Unit CMC_04_20ProvidinggreaterflexibilityforNewCapacitytocombinecandidateunitsintoasingleCapacityMarketUnit.docx SEM-20-039CMCModsWG12CMC_04CMC_06DecisionPaper.pdf	RA Decision: Recommended for Rejection	Closed	Section E
CMC_03_20	Modification to the Long Stop Date for the CY2023 / 24 T-4 Capacity Auction CMC_03_20-ModtoLSDarisingfromCMC_02_20v0_1.docx RA-CMCModificationWG11(b).pdf SEM-20-019CMCModsWG11(b)DecisionPaper.pdf SEM-20-019(a)AppA-CMC_03_20ApprovedDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section M	30/03/2020
CMC_02_20	Modification to the required time frame for a T-4 Capacity Auction to take place CMC_02_20-ModtotherequiredtimeframeforaT-4CapAuctiontotakeplace.docx RA-CMCModificationWorkshop270120.pdf CMC_02_20-DecisionLetter.pdf SEM-20-008(a)AppA-CMC_02_20ApprovedDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section M	12/02/2020
CMC_01_20	Modification to the required time frame for a T-4 Capacity Auction to take place CMC_01_20ModificationtotherequiredtimeframeforaT-4CapacityAuctiontotakeplace.docx	Withdrawn	Closed	Section D
CMC_09_19	Supplementary Interim Secondary Trading CMC_09_19-Modification-SupplementaryInterimSecondarytrading.docx CMC_09_19-SupplementaryInterimSecondaryTradingSlides.pptx CMC_09_19-SupplementaryInterimSecondarytradingv2.docx SEM-020-064CMCModsWG12CMC_09_1907_2008_20DecisionPaper.pdf SEM-020-064AppendixC-CMC_09_19ApprovedModificationTextDrafting.pdf SEM-20-077AddendumtoSEM-20-064.pdf SEM-20-077aAppendixA-ApprovedTextDraftingUpdatedtoCorrectM.11.6....pdf SEM-020-064AppendixC-CMC_09_19ApprovedModificationTextDrafting.docx	RA Decision: Approved (Not Vetoed)	Closed	Section M	13/11/2020
CMC_08_19	Housekeeping Mod E.8.2.5 & E.8.2.8 CMC_08_19-HousekeepingModE.8.2.5E.8.2.8.docx CMC_08_19Presentation.pdf SEM-20-009CMCModWG10DecisionPaper.pdf SEM-20-009(a)AppendixA-CMC_08_19ApprovedDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section E	17/02/2020
CMC_07_19	Treatment of Multiyear Contracts in the Event of Simultaneous Capacity Auctions CMC_07_19TreatmentofMultiyearContractsintheEventofSimultaneousCapacityAuctions.docx CMC_07_19Presentation.pptx CMC_07_19CMCModsWG7DecisionPaper.pdf	RA Decision: Recommended for Rejection	Closed	Section E,Section F
CMC_06_19	Modification to the Proportion of Delivered Capacity calculation (G.3.1.4) CMC_06_19ModificationtotheProportionofDeliveredCapacitycalculation(G.3.1.4).docx CMC_06_19_v2-ModificationtotheProportionofDeliveredCapacitycalculation(G.3.1.4).docx CMC_06_19ModificationtotheProportionofDeliveredCapacitycalculationv3.docx SEM-19-046-CMCModsWG6DecisionPaper.pdf CMC_06_19SEM-19-046AppendixA-CMCApprovedDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section G	12/09/2019
CMC_05_19	Housekeeping Changes CMC_05_19HousekeepingChanges.docx CMC_05_19HousekeepingChangespresentation.pptx SEM-19-046-CMCModsWG6DecisionPaper.pdf CMC_06_19SEM-19-046AppendixA-CMCApprovedDrafting.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section F,Section J	12/09/2019
CMC_04_19	Finalisation of Exchange Rate in Auction Information Pack ModCMC_04_19-presentation.pptx CMC_04_19FinalisationofExchangeRateinAuctionInformationPack.docx CMC_04_19FinalisationofExchangeRateinAuctionInformationPack-rev1.docx SEM-19-015-CMCMods-Set3Decision.pdf	RA Decision: Recommended for Rejection	Closed	Section D
CMC_03_19	Treatment of Exempt Price-Quantity Pairs CMC_03_19TreatmentofExemptPrice-QuantityPairs.docx SEM-19-014-UrgentCMCModSet2.pdf DecisionletterCMC_03_19.pdf	RA Decision: Approved (Not Vetoed)	Closed	Definitions,Section F	20/03/2019
CMC_02_19	Negative Interest CMC_02_19NegativeInterest.docx SEM-19-014-UrgentCMCModSet2.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section B,Section J	20/03/2019
CMC_01_19	Interim Solution for Conducting Capacity Auctions CMC_01_19InterimSolutionforconductingCapacityAuctions.docx RA-CMC_01_19.pptx SEM-19-014-UrgentCMCModSet2.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section M	20/03/2019
CMC_14_18	Proposed Modifications in Regards to the Modification of LCC MW Limits by the RAs CMC_14_18LCCMWLimits.docx RA-CMCUrgentModificationWorkshopv0_1.pptx SEM-18-174-CapacityMarketCodeUrgentModifications-Set1.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section F	30/11/2018
CMC_13_18	Modification to Letter of Credit CMC_13_18Modification_LetterofCredit.docx CM_Mod_13_18_LetterofCreditAmendment.pptx SEM-18-164CapacityMarketCodeModificationsSet2DecisionPaper.pdf	RA Decision: Approved (Not Vetoed)	Closed		30/11/2018
CMC_12_18	Tolerance Class CMC_12_18ToleranceClass.docx SEM-18-164CapacityMarketCodeModificationsSet2DecisionPaper.pdf RA-CMCModificationsWorkshop2v0_1.pptx	RA Decision: Approved (Not Vetoed)	Closed	Definitions,Section D,Section E	30/11/2018
CMC_11_18	Long Stop Date CMC_11_18LongStopDate.docx SEM-18-164CapacityMarketCodeModificationsSet2DecisionPaper.pdf RA-CMCModificationsWorkshop2v0_1.pptx	RA Decision: Approved (Not Vetoed)	Closed	Definitions,Section D,Section J	30/11/2018
CMC_10_18	Paragraph B.10.4.1 Report on Capacity Auction CMC_10_18-ReportonCapacityAuction-B_10_4_1.docx CMC_10_18Presentation.pptx Elections-2013.ppt SEM-18-044CapacityMarketCodeModificationsModsSet1Decision.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section B	01/10/2018
CMC_09_18	Paragraph E.9.5.1 Publication of Qualification Results CMC_09_18-PublicationofQualificationResults.docx CMC_09_18Presentation.pptx SEM-18-044CapacityMarketCodeModificationsModsSet1Decision.pdf	RA Decision: Approved (Not Vetoed)	Closed		01/10/2018
CMC_08_18	Typographical Correction E.8.2.4 CMC_08_18MissingMultiplicationSigninE.8.2.4.docx SEM-18-044CapacityMarketCodeModificationsModsSet1Decision.pdf	RA Decision: Approved (Not Vetoed)	Closed		01/10/2018
CMC_07_18	Subsection F.9.5 Information Published following a Capacity Auction CMC_07_18Presentation.pptx CMC_07_18-F.9.5InformationPublishedfollowingaCapacityAuction.docx SEM-18-044CapacityMarketCodeModificationsModsSet1Decision.pdf	RA Decision: Approved (Not Vetoed)	Closed		01/10/2018
CMC_06_18	Disaggregation of Performance Security Requirements to Capacity Market Auctions CMC_06_18-DisaggregationofPerformanceSecurityRequirementstoCapacityMarketUnits.docx	RA Decision: Recommended for Rejection	Closed	Section J
CMC_05_18	Combining Candidate Units into a Capacity Market Unit CMC_05_18-CombinedMarketUnitExceptions.docx CMC_05_18Presentation.pptx	RA Decision: Recommended for Rejection	Closed	Section F
CMC_04_18	F.2.1.1 Capacity Auction Participation CMC_04_18F.2.1.1-CapacityAuctionParticipation.docx CMC_04_18Presentation.pptx SEM-18-044CapacityMarketCodeModificationsModsSet1Decision.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section F	01/10/2018
CMC_03_18	E.5.1.1.A CMC_03_18-ConnectionAgreementException.docx CMC_03_18Presentation.pptx	Withdrawn	Closed	Appendix D,Section E,Section J
CMC_02_18	Permitted Disclosures Credit Agencies CMC_02_18Presentation.pptx CMC_02_18-PermittedDisclosures-CreditAgencies.docx SEM-18-044CapacityMarketCodeModificationsModsSet1Decision.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section B	01/10/2018
CMC_01_18	NICROS in the CRM CMC_01_18Presentation.pptx CMC_01_18NIROCsintheCRM.docx SEM-18-044CapacityMarketCodeModificationsModsSet1Decision.pdf	RA Decision: Approved (Not Vetoed)	Closed	Section E	01/10/2018

Capacity Market Modifications

Capacity Modifications Workshops consider any change to the Capacity Market Code. A Workshop is held every 2 months. Details of scheduled meetings can be found in the meetings calendar below.

Capacity Market Modifications Workshops

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