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 Modifications 

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 The Trading and Settlement Code Modifications Committee is the forum for considering change to the Trading and Settlement Code. The Modifications Committee meets every 2 months. Details of all scheduled meetings can be found on the Market Development calendar.

The 2018 calender of Modification events is available for download at this link






Mod ID Title Mod Status Stage Section Affected Effective Date
MOD_22_18 Part B Credit Cover Signage & Subscript Correction New Active T&SC Glossary  
MOD_21_18 Application of Settlement Reallocation Agreements to Market Operator Charges & Settlement Dcument Definition & Usage New Active T&SC Appendix G; T&SC Glossary; Agreed Procedure 1; Agreed Procedure 10; Agreed Procedure 15; Agreed Procedure 17  
MOD_20_18 Agreed Procedure Updates New Active Agreed Procedure 1; Agreed Procedure 4; Agreed Procedure 15; Agreed Procedure 17  
MOD_19_18 Part B Housekeeping 1 New Active T&SC Appendix E; T&SC Appendix H; T&SC Appendix I; T&SC Glossary  
MOD_18_18 Mod_18_18 Transitional Regulatory Reporting Deferred Active    
MOD_17_18 Mod_17_18 Transitional Provisions for Cutover Deferred Active    
MOD_16_18 Mod_16_18 Interim Suspension Delay Periods Recommended for Approval Active    
MOD_15_18 Mod_15_18 Clarifications for Instruction Profiling Recommended for Approval Active    
MOD_14_18 Mod_14_18 Change to timing of publication of Trading Day Exchange Rate Recommended for Approval Active    
MOD_13_18 Mod_13_18 Calculating Obligated Capacity Quantities for Units Not Yet Commissioned Recommended for Approval Active    
MOD_12_18 Mod_12_18 Modifcation to Part B Agreed Procedure 17 Recommended for Approval Active    
MOD_11_18 Mod_11_18 Correction of Minor Material Drafting Errors Recommended for Approval Active    
MOD_10_18 Mod_10_18 Amendment to Capacity Settlement Publication from Monthly to Daily Recommended for Approval Active    
MOD_09_18 Mod_09_18 Interim Credit Treatment for Participants with Trading Site Supply Units Recommended for Approval Active    
MOD_08_18 Mod_08_18 Clarification of rules used to determine the value of Price Average Reference Tag (TPAR) Recommended for Approval Active    
MOD_07_18 Mod_07_18 Clarifications of use of variable “b” in NIV and PAR Tagging scenarios Recommended for Approval Active    
MOD_06_18 Mod_06_18 - Clarification of Marginal Energy Action Price calculation including scenario when all actions are flagged Recommended for Approval Active    
MOD_05_18 Mod_05_18 Clarification of Administered Scarcity Pricing function for scenarios not yet covered in rules Recommended for Approval Active    
MOD_04_18 Mod_04_18 Reporting and Publication for Operational Schedules, Dispatch Instructions, Forecast Availability and SO Trades Recommended for Approval Active    
MOD_03_18 Autoproducer Credit Cover Deferred Active    
MOD_02_18 Meter Data Publication Timing Recommended for Approval Active    
MOD_01_18 Notification of Suspension to SEM NEMOs RA Decision: Approved (Not Vetoed) Active   05/04/2018
MOD_18_17 Net Inter Jurisdictional Flow Submission Recommended for Approval Active    
MOD_17_17 Recovery of Costs due to Invalid Ex-Ante Contracted Quantities in Imbalance Settlement Recommended for Approval Active T&SC Section 1  
MOD_16_17 Funding in relation to EirGrid/SONI payment obligations Recommended for Approval Active T&SC Section 1  
MOD_15_17 Credit Treatment for Adjusted Participants RA Decision: Approved (Not Vetoed) Active   29/03/2018
MOD_14_17 Part B Suspension When Suspended Under Part A RA Decision: Approved (Not Vetoed) Active   29/03/2018
MOD_13_17 Deferral of SEM NEMO Credit Reports and Non-acceptance of Contracted Quantities Recommended for Approval Active T&SC Section 1  
MOD_12_17 Outage Adjusted Wind and Solar Forecast Reports RA Decision: Approved (Not Vetoed) Active T&SC Section 1 29/03/2018
MOD_11_17 Deferral of Information Imbalance Charges RA Decision: Approved (Not Vetoed) Active   09/02/2018
MOD_10_17 Ex-Ante Quantities Deferral RA Decision: Approved (Not Vetoed) Active   26/02/2018
MOD_09_17 Solar in I-SEM RA Decision: Approved (Not Vetoed) Active   06/02/2018
MOD_08_17 Decremental Price Quantity Pair Submission RA Decision: Approved (Not Vetoed) Active   06/02/2018
MOD_07_17 Credit Assessment Volume for Generator Units RA Decision: Approved (Not Vetoed) Active T&SC Section 1 06/02/2018
MOD_06_17 Transitional Credit Cover Provisions RA Decision: Approved (Not Vetoed) Active T&SC Section 1 26/02/2018
MOD_05_17 Amendment to the Part B Form of Authority for the purpose of removing the Restricted Authority provision RA Decision: Approved (Not Vetoed) Active T&SC Section 1 24/10/2017
MOD_04_17 Solar in the SEM RA Decision: Approved (Not Vetoed) Active T&SC Section 1 24/10/2017
MOD_03_17 Treatment of Transmission Losses for Trading Sites with Contiguous Autoproducers in I-SEM RA Decision: Approved (Not Vetoed) Active T&SC Section 1  
MOD_02_17 Unsecured Bad Energy Debt & Unsecured Bad Capacity Debt Timelines. RA Decision: Further review required Active T&SC Section 1  

SEMO is a joint venture between EirGrid PLC and SONI Limited