Modification 0710 Provision of Class 1 Service by

Modification 0710 - Provision of Class 1 Service by CDSP DSC Class 1 Read Service Supporting Document Contract Management Committee 19 May 2021

Purpose of this presentation • Modification 0710 (XRN 5218) obligates the CDSP to take over the contractual arrangements currently in place between Transporters and the Daily Metered Service Providers (DMSP), to procure and provide the Class 1 read service. • At the April Co. MC we discussed the DSC Class 1 Read Service Supporting Document and what was proposed to be included within it. To confirm, the document is proposed to be created in order to detail key information relevant to parties utilising the service and in certain cases, information which is being removed from the UNC under Modification 0710. • This presentation intends to summarise the key elements of the document to support the Co. MC in approving it at the May meeting. • Please see attached the DSC Class 1 Read Service Supporting Document:

What is included within the DSC Class 1 Read Service Supporting Document • Performance – • Liabilities Logic – – • Expectation on Shippers in relation to the installation of Daily Metered (DM) Read Equipment. Please note, the current process for the installation of DM Read Equipment will remain as is, this section will simply cover this at a high level. Within-Day Service – • Where a liability will be incurred and how it is calculated. This will predominantly be a ‘lift and shift’ of the liabilities logic currently within Section M of the UNC which will be removed post-0710. Shipper Dependencies – – • Current performance standards the DMSPs are expected to adhere to for the service and MI reporting. High level overview of the within-Day service and how it will be delivered. Modification 0691 – Overview of Modification 0691 and how it interacts with the Class 1 read service

Things for Co. MC to Consider • Within Section 2, it details how the document can be amended. Worth highlighting that: – – • Are DSC Co. MC satisfied that this document is governed under the DSC Co. MC – • Are any specific amendments required to the DSC Co. MC documents – e. g. • To. R - change is NOT currently proposed • DSC Contract Management Arrangements - change is NOT currently proposed • [Others? ] Does the DSC Co. MC require any further governance for this document (e. g. Market Domain Data Market Participant Identity Verification Approach Document was added to the UKLM) – • Xoserve will need to assess proposed changes against the contract and for technical changes If there are technical changes proposed, this will need to be assessed with other industry parties and therefore managed through DSC. The Co. MC will still manage the document but the technical changes will be a deliverable under the Change Proposal If so, next steps (e. g. if we need a UNC Mod – do we have a proposer) As the document is governed under DSC Co. MC, the escalation point is to UNCC – Do we need to state this (or is this already clear)?

Next steps • Request formal approval of the DSC Class 1 Read Service Supporting Document by the DSC Co. MC. • If approved, the document will become live at the same time as the Modification 0710 and XRN 5218 implementation date.

Any questions?