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XRN 5286
Clarificatory change to the AQ amendment process to be applied retrospectively (Modification 0746)

Last Updated
14 Dec 2020
Release Type
Implementation Date
Proposer CDSP Impacted DSC service area

Service Area 1 (Previous Dec 18 – Mar 21)

Manage Supply Point Registration

Customer Change Team Leader


Closed following Ofgem Decision. 

Modification 746 has been raised to clarify the circumstances in which specific AQ Corrections can be made and to apply this clarification from the 1 April 2020. Therefore, this Change Proposal has been raised to deliver the changes required as set out within this Mod 746.

Please note, that this Modification was previously ‘736A’, an alternate to Modification 736 before both Modifications were decoupled.

This change seeks to seeks to clarify that where a User is affiliated to the previously Registered User, they cannot utilise ‘Reason Code 3’ to submit an AQ correction. Reason Code 3 is “the commencement of a new business activity or discontinuance of an existing business activity at the consumer's premises”.

If Modification 0736 is approved and implemented, Users will not be allowed to utilise this reason code when completing an AQ correction where the relevant Supply Point has moved between Users in the same organisation group (where they are affiliated). Modification 0746 looks to apply these rules retrospectively from 01 April 2020 in order to remedy any situation where this has taken place previously. At a high level, to apply this logic retrospectively, the CDSP will be required to identify all AQ corrections submitted using reason code 3 from 01 April 2020 to the implementation date of Modification 0736. For any of these sites, where the Shipper cannot evidence the AQ correction was valid (they are/were not affiliated to the previous User), the AQ correction would have to be reversed and the associated charges applied.

Due to the nature of the change (being retrospective) and a quick implementation following approval anticipated, we are expecting a predominantly manual solution.  

Impacted Customer Types

  • IGT
  • Shipper
  • DNO


Document title Comment Last updated CHMC outcome
Change Proposal Approved 09/12/2020 Approved into Capture 09/12/2020
Initial Review Stage not used N/A N/A
High Level Solution Options Stage not yet reached N/A N/A
Solution Review Stage not yet reached N/A N/A
Detailed Design Stage not yet reached N/A N/A
Evaluation Quotation Reports (EQR) Stage not yet reached N/A N/A
Business Evaluation Reports (BER) Stage not yet reached N/A N/A
Change Completion Reports (CCR) Stage not yet reached N/A N/A


Initial Review
Start: 00/00/00
Status Awaiting
Expected: 14/12/20
Status ChMC approved to Capture on 09/12/20
Solution Consultation
Expected: 00/00/00
Status Awaiting
Awaiting Delivery
Expected: 00/00/00
Status Awaiting
In Delivery
Expected: 00/00/00
Status Awaiting
Expected: 00/00/00
Status Awaiting

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