23.0

<div data-id="1-1.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">1.1 Purpose and Scope of the Procedure</div>

<div data-id="1-1.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">1.2 Main Users of the Procedure and their Responsibilities</div>

<div data-id="1-1.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">1.3 Use of the Procedure</div>

<html><head></head><body><div data-id="1-1.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">1.4 Balancing and <u class="defined-term">Settlement</u> <u class="defined-term">Code</u> Provision</div></body></html>

<div data-id="1-1.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">1.5 Associated <u class='defined-term'>BSC Procedure</u>s</div>

<div data-id="1-1.6-1.6.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">1.6.1 Acronyms</div>

<div data-id="1-1.6-1.6.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">1.6.2 Definitions</div>

<div data-id="1-1.6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">1.6 Acronyms and Definitions</div>

<div data-id="1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span>1. Introduction</span></div>

<div data-id="3-3.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">3.1 Changes to <u class='defined-term'>Market Domain Data</u> Provided by the <u class='defined-term'>Profile Administrator</u></div>

<div data-id="3-3.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">3.2 Changes to <u class='defined-term'>SVAA</u> Calendar</div>

<html><head></head><body><div data-id="3-3.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">3.3 General Changes to MDD<a class="sdfootnoteanc" name="sdfootnote7anc" href="#sdfootnote7sym" data-footnote="Approved MDD changes for new Suppliers, new <u class='defined-term'>LDSO</u>s, existing <u class='defined-term'>LDSO</u>s and new <u class='defined-term'>Party Agent</u>s should be made in accordance with the criteria in Appendix 4.3. MDD changes related to MDD Housekeeping, Registration of New <u class='defined-term'>Market Participant</u>s or registration of <u class='defined-term'>Additional BM Unit</u>s should follow 3.6."><sup>7</sup></a></div></body></html>

<div data-id="3-3.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">3.4 Agree Implementation, Publication and Release Schedule</div>

<div data-id="3-3.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">3.5 Treating Emergency Fixes<a class="sdfootnoteanc" name="sdfootnote12anc" href="#sdfootnote12sym" data-footnote="An emergency fix will only be required if, following an MDD publish and subsequent go-live, an error in the MDD data is reported, either by BSCCo, the <u class='defined-term'>SVAA</u> or a <u class='defined-term'>Market Participant</u>. An emergency fix can be defined as an additional publish of MDD which would include an incremented version number."><sup>12</sup></a></div>

<html><head></head><body><div data-id="3-3.6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">3.6 MDD Fast Track - MDD Housekeeping Changes, Registration of New <u class="defined-term">Market Participant</u>s and <u class="defined-term">Additional <u class="defined-term">BM Unit</u></u>s</span></div></body></html>

<div data-id="3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span>3. Interface and Timetable Information</span></div>

<div data-id="4-4.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.1 MDD Entities &amp; Authorisation Route</div>

<div data-id="4-4.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.2 MDD Forms</div>

<html><head></head><body><div data-id="4-4.3-4.3.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.3.1 New <u class="defined-term"><u class="defined-term">Supplier</u></u>s / <u class="defined-term">Licensed Distribution <u class="defined-term">System</u> Operator</u>s (<u class="defined-term">LDSO</u>s)</div></body></html>

<div data-id="4-4.3-4.3.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.3.2 Existing <u class='defined-term'>LDSO</u>s registering in a <u class='defined-term'>GSP Group</u></div>

<html><head></head><body><div data-id="4-4.3-4.3.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.3.3 New BSC <u class="defined-term"><u class="defined-term">Party</u> Agent</u>s</div></body></html>

<div data-id="4-4.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.3 MDD Registration Criteria</div>

<div data-id="4-4.4-4.4.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.4.1 MDD Entity Change Request Forms for CFD</div>

<div data-id="4-4.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.4 MDD Entity Change Request Forms</div>

<div data-id="4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span>4. Appendices</span></div>

<div data-id="amendment-record--bscp509" style="margin-left:0.3in;text-indent:-0.3in;text-align: center">AMENDMENT RECORD – BSCP509</div>

CONTENTS

BSCP509: Changes to Market Domain Data V23.0

Defined Terms

Cross-references