23.0

<div data-id="1-1.1" style="margin-left:0.59in;text-indent:-0.59in;text-align: justify">1.1 Purpose</div>

<div data-id="1-1.2" style="margin-left:0.59in;text-indent:-0.59in;text-align: justify">1.2 References</div>

<div data-id="1" style="margin-left: 1em">1 Introduction</div>

<div data-id="2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">2 Management Summary</div>

<div data-id="3" style="margin-left:0.59in;text-indent:-0.59in;text-align: justify">3 Scope of Specification</div>

<div data-id="4-4.1" style="margin-left:0.59in;text-indent:-0.59in;text-align: justify">4.1 Summary of Business Requirements</div>

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

<div data-id="4-4.3" style="margin-left:0.59in;text-indent:-0.59in;text-align: justify">4.3 Numbering Scheme for Requirement Definitions</div>

<div data-id="4-4.4" style="margin-left:0.59in;text-indent:-0.59in;text-align: justify">4.4 Attributes of Individual Requirements</div>

<html><head></head><body><div data-id="4" style="margin-left:0.59in;text-indent:-0.59in;text-align: justify">4 Business and <u class="defined-term">System</u> Overview</div></body></html>

<div data-id="5-5.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.1 <u class='defined-term'>BMRA</u>-F001: Calculate Balancing Mechanism and <u class='defined-term'>Replacement Reserve</u> Volumes</div>

<div data-id="5-5.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.2 <u class='defined-term'>BMRA</u>-F002: Calculate Indicative Period BM and RR Unit Total Accepted Bid and <u class='defined-term'>Offer</u> Volume</div>

<div data-id="5-5.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.3 <u class='defined-term'>BMRA</u>-F003: Calculate Estimated Period Balancing Mechanism and <u class='defined-term'>Replacement Reserve Bid</u> and <u class='defined-term'>Offer</u> Cashflows</div>

<html><head></head><body><div data-id="5-5.4-5.4.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><b>5.4.2 <u class="defined-term">BMRA</u>-F004b: Calculate Estimated <u class="defined-term">System</u> Buy and Sell Prices using the P217 methodology</b></div></body></html>

<div data-id="5-5.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.5 <u class='defined-term'>BMRA</u>-F005: Postponement of Calculations</div>

<div data-id="5-5.6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.6 <u class='defined-term'>BMRA</u>-F006: Validate <u class='defined-term'>Market Index Data</u></div>

<div data-id="5-5.7" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.7 <u class='defined-term'>BMRA</u>-F007: Generate Missing <u class='defined-term'>Market Index Data</u> Messages</div>

<div data-id="5-5.8" style="margin-left:0.79in;text-align:left;text-indent:-0.79in">5.8 <u class='defined-term'>BMRA</u>-F008: Process <u class='defined-term'>Market Index Data Provider</u> Liquidity Thresholds</div>

<div data-id="5-5.9" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.9 <u class='defined-term'>BMRA</u>-F009: Validate Adjustment Data</div>

<div data-id="5-5.10" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.10 <u class='defined-term'>BMRA</u>-F011: Process SO-SO Trades</div>

<html><head></head><body><div data-id="5-5.11" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.11 <u class="defined-term">BMRA</u>-F012: Process <u class="defined-term"><u class="defined-term">Settlement</u> Exchange Rate</u></div></body></html>

<div data-id="5" style="margin-left:0.59in;text-indent:-0.59in;text-align: justify">5 Functional Requirements</div>

<div data-id="6-6.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6.1 Overview</div>

<div data-id="6-6.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6.2 Inbound Interface Requirements</div>

<div data-id="6-6.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6.3 Outbound Interface Requirements</div>

<div data-id="6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6 External interfaces</div>

<div data-id="7-7.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">7.1 <u class='defined-term'>BMRA</u>-N001: Security for <u class='defined-term'>BMRA</u> Service</div>

<div data-id="7" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">7 Non-Functional Requirements</div>

<div data-id="8-8.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8.1 <u class='defined-term'>BMRA</u>-S001: High Grade <u class='defined-term'>BMRA</u> Service Availability</div>

<div data-id="8-8.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8.2 <u class='defined-term'>BMRA</u>-S002: Low Grade <u class='defined-term'>BMRA</u> Service Availability</div>

<div data-id="8-8.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8.3 <u class='defined-term'>BMRA</u>-S003: Data Storage</div>

<div data-id="8-8.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8.4 <u class='defined-term'>BMRA</u>-S005: Data Access and Display</div>

<div data-id="8-8.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8.5 <u class='defined-term'>BMRA</u>-S006: Volumetric Requirements</div>

<div data-id="8-8.6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8.6 <u class='defined-term'>BMRA</u>-S007: Resilience Requirements</div>

<div data-id="8" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">8 Service Requirements</div>

<div data-id="9" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">9 User Roles and Activities</div>

<div data-id="10" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10 Future Enhancements</div>

<div data-id="appendix-a-glossary" style="margin-left:0.79in;text-align:left;text-indent:-0.79in">Appendix A Glossary</div>

<div data-id="appendix-b-requirement-summary-matrix" style="margin-left:0.79in;text-align:left;text-indent:-0.79in">Appendix B Requirement Summary Matrix</div>

<div data-id="appendix-c-bmra-external-data-flow-timings-and-formats" style="margin-left:0.79in;text-align:left;text-indent:-0.79in">Appendix C <u class='defined-term'>BMRA</u> external data flow timings and formats</div>

<div data-id="appendix-d-bmra-forecast-data-time-line" style="margin-left:0.79in;text-align:left;text-indent:-0.79in">Appendix D <u class='defined-term'>BMRA</u> forecast data time-line</div>

<div data-id="appendix-e-bmra-settlement-period-time-line" style="margin-left:0.79in;text-align:left;text-indent:-0.79in">Appendix E <u class='defined-term'>BMRA</u> settlement period time-line</div>

<div data-id="appendix-f-logical-data-model" style="margin-left:0.79in;text-align:left;text-indent:-0.79in">Appendix F Logical Data Model</div>

<html><head></head><body><div data-id="appendix-g-price-derivation-code-definitions" style="margin-left:0.79in;text-align:left;text-indent:-0.79in">Appendix G Price Derivation <u class="defined-term">Code</u> Definitions</div></body></html>

CONTENTS

Balancing Mechanism Reporting Agent V23.0

Defined Terms

Cross-references