This is the Service Description for the Energy Contract Volume Aggregation Agent (ECVAA) appointed by ELEXON to aggregate energy contract volumes under the BSC.

26.0

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

<div data-id="2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">2. PERIOD OF RESPONSIBILITY</div>

<div data-id="3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">3. AVAILABILITY OF SERVICE</div>

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

<div data-id="5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5. CREDIT LIMIT DATA</div>

<div data-id="6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6. ENERGY CONTRACT VOLUME AUTHORISATIONS</div>

<div data-id="7" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">7. METERED VOLUME REALLOCATION AUTHORISATIONS</div>

<div data-id="8" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8. ENERGY CONTRACT VOLUME NOTIFICATIONS</div>

<div data-id="9" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">9. METERED VOLUME REALLOCATION NOTIFICATIONS</div>

<div data-id="9" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">9A WHOLESALE MARKET ACTIVITY NOTIFICATIONS</div>

<div data-id="10" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10. CREDIT CHECK CALCULATIONS</div>

<div data-id="11" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">11. REDUCTION OF CREDIT COVER</div>

<div data-id="12" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">12. CREDIT DEFAULT CALCULATIONS</div>

<div data-id="13" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">13. REFUSAL AND REJECTION FOR CREDIT REASONS</div>

<div data-id="14" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">14. <u class='defined-term'>ECVAA</u> SYSTEM FAILURE</div>

<div data-id="15" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">15. <u class='defined-term'>ECVAA</u> SYSTEM WITHDRAWAL</div>

<div data-id="16" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">16. TIMEKEEPING</div>

<div data-id="17" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">17. VOLUME NOTIFICATION NULLIFICATION REQUESTS</div>

<div data-id="18" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">18. REMOVAL OF ECVNs AND MVRNs FOR A DEFAULTING PARTY</div>

<div data-id="19" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">19. EXTENDED FORWARD CONTRACT REPORTS</div>

<div data-id="20" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">20. CONTINGENCY PROVISIONS</div>

<div data-id="21" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">21. TRADING DISPUTES</div>

<div data-id="22" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">22. THE <u class='defined-term'>ECVAA</u> WEB SERVICE:WEB BASED REPORTING AND WEB BASED NOTIFICATION SUBMISSION</div>

<div data-id="23" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">23. BREACH OF 100% CREDIT COVER PERCENTAGE</div>

<div data-id="appendix-a---input-output-flows" style="text-align:left">Appendix A - Input Output Flows</div>

CONTENTS

Energy Contract Volume Aggregation Agent (ECVAA) Service Description V26.0