4.20

<div data-id="1" style="text-align:left"><span lang="en-US">1. </span>FOREWORD</div>

<div data-id="2" style="text-align:left"><span lang="en-US">2. </span>SCOPE</div>

<div data-id="3" style="text-align:left"><span lang="en-US">3. </span>REFERENCES</div>

<div data-id="4-4.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.1 <u class='defined-term'>Active Energy</u></div>

<div data-id="4-4.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.2 <u class='defined-term'>Active Power</u></div>

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

<div data-id="4-4.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.4 Demand Values</div>

<div data-id="4-4.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.5 Electricity</div>

<div data-id="4-4.6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.6 Energy Storage Device</div>

<div data-id="4-4.8" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.8 <u class='defined-term'>Import</u></div>

<div data-id="4-4.9" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.9 Interrogation Unit</div>

<div data-id="4-4.10" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.10 Maximum Demand</div>

<div data-id="4-4.11" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.11 <u class='defined-term'>Meter</u></div>

<div data-id="4-4.12" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.12 <u class='defined-term'>Metering Equipment</u></div>

<div data-id="4-4.13" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.13 <u class='defined-term'>Meter</u> Register</div>

<div data-id="4-4.14" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.14 <u class='defined-term'>Outstation</u></div>

<div data-id="4-4.15" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.15 Password</div>

<div data-id="4-4.16" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.16 <u class='defined-term'>Outstation</u> <u class='defined-term'>System</u></div>

<div data-id="4-4.18" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.18 Registrant</div>

<div data-id="4-4.19" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.19 Settlement Instation</div>

<div data-id="4-4.20" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.20 <u class='defined-term'>SVA Customer</u></div>

<div data-id="4-4.21" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">4.21 Universal Time Clock (UTC)</div>

<div data-id="4" style="text-align:left"><span lang="en-US">4. </span>DEFINITIONS AND INTERPRETATIONS</div>

<div data-id="5-5.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.1 Measured Quantities</div>

<div data-id="5-5.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">5.2 Accuracy Requirements</div>

<div data-id="5" style="text-align:left"><span lang="en-US">5. </span>MEASUREMENT CRITERIA</div>

<div data-id="6-6.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6.1 <u class='defined-term'>Meter</u>s</div>

<div data-id="6-6.2-6.2.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">6.2.1 </span>Data Provision requirements</div>

<div data-id="6-6.2-6.2.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">6.2.2 </span>Time Keeping</div>

<div data-id="6-6.2-6.2.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">6.2.3 </span>Monitoring Facilities - Broadcast Clocks</div>

<div data-id="6-6.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6.2 <u class='defined-term'>Outstation</u></div>

<div data-id="6-6.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6.3 Displays and Facilities</div>

<div data-id="6-6.4-6.4.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">6.4.1 </span>Local Interrogation</div>

<div data-id="6-6.4-6.4.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">6.4.2 </span>Remote Interrogation</div>

<div data-id="6-6.4-6.4.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">6.4.3 </span>Standard Protocol</div>

<div data-id="6-6.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6.4 <u class='defined-term'>Communication</u>s</div>

<div data-id="6-6.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6.5 Security Requirements</div>

<div data-id="6-6.6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">6.6 Sealing</div>

<div data-id="6" style="text-align:left"><span lang="en-US">6. </span>METERING EQUIPMENT CRITERIA</div>

<div data-id="7-7.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">7.1 Interrogation Unit</div>

<div data-id="7-7.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">7.2 Additional Features</div>

<div data-id="7" style="text-align:left"><span lang="en-US">7. </span>ASSOCIATED FACILITIES</div>

<div data-id="8" style="text-align:left"><span lang="en-US">8. </span>ACCESS TO DATA</div>

<div data-id="9-9.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">9.1 Appendix 1a: Outline Data Structure</div>

<div data-id="9-9.2-9.2.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">9.2.1 </span>"TAG" Data Header Block</div>

<div data-id="9-9.2-9.2.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">9.2.2 </span>Daily Header Block</div>

<div data-id="9-9.2-9.2.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">9.2.3 </span>Data Block</div>

<div data-id="9-9.2-9.2.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">9.2.4 Data Authenticator</div>

<div data-id="9-9.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">9.2 Appendix 1b: Data Structure and Formats</div>

<div data-id="9" style="text-align:left"><span lang="en-US">9. </span>Appendix 1: Outline Data Structure and Formats</div>

<div data-id="10-10.1-10.1.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.1.1 </span>General Definition</div>

<div data-id="10-10.1-10.1.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.1.2 </span>Data Definition</div>

<div data-id="10-10.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.1 Data Block</div>

<div data-id="10-10.2-10.2.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.2.1 </span>General Definition</div>

<div data-id="10-10.2-10.2.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.2.2 </span>Data Definition</div>

<div data-id="10-10.2-10.2.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.2.3 </span>Data Definition</div>

<div data-id="10-10.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.2 <u class='defined-term'>Meter</u> <u class='defined-term'>Identifier</u> - MID</div>

<div data-id="10-10.3-10.3.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.3.1 </span>General Definition</div>

<div data-id="10-10.3-10.3.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.3.2 </span>Data Definition</div>

<div data-id="10-10.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.3 Date and Time of Reading <u class='defined-term'>Meter</u></div>

<div data-id="10-10.4-10.4.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.4.1 </span>General Definition</div>

<div data-id="10-10.4-10.4.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.4.2 </span>Data Definition</div>

<div data-id="10-10.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.4 kWh Cumulative Reading</div>

<div data-id="10-10.5-10.5.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.5.1 </span>General Definition</div>

<div data-id="10-10.5-10.5.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.5.2 </span>Data Definition</div>

<div data-id="10-10.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.5 Current kW Maximum Demand</div>

<div data-id="10-10.6-10.6.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.6.1 </span>General Definition</div>

<div data-id="10-10.6-10.6.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.6.2 </span>Data Definition</div>

<div data-id="10-10.6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.6 Previous kW Maximum Demand</div>

<div data-id="10-10.7-10.7.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.7.1 </span>General Definition</div>

<div data-id="10-10.7-10.7.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.7.2 </span>Data Definition</div>

<div data-id="10-10.7" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.7 Cumulative Maximum Demand</div>

<div data-id="10-10.8-10.8.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.8.1 </span>General Definition</div>

<div data-id="10-10.8-10.8.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.8.2 </span>Data Definition</div>

<div data-id="10-10.8" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.8 Date Of Last MD Reset</div>

<div data-id="10-10.9-10.9.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.9.1 </span>General Definition</div>

<div data-id="10-10.9-10.9.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.9.2 </span>Data Definition</div>

<div data-id="10-10.9" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.9 Number Of Maximum Demand Resets</div>

<div data-id="10-10.10-10.10.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.10.1 </span>General Definition</div>

<div data-id="10-10.10-10.10.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.10.2 </span>Data Definition</div>

<div data-id="10-10.10" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.10 Multi-rate Energy Registers</div>

<div data-id="10-10.11-10.11.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.11.1 </span>General Definition</div>

<div data-id="10-10.11-10.11.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.11.2 </span>Data Definition</div>

<div data-id="10-10.11" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.11 Number of Days Data in Message</div>

<div data-id="10-10.12-10.12.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.12.1 </span>General Definition</div>

<div data-id="10-10.12-10.12.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.12.2 </span>Data Definition</div>

<div data-id="10-10.12" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.12 <u class='defined-term'>Profile</u> Data</div>

<div data-id="10-10.13-10.13.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.13.1 </span>General Definition</div>

<div data-id="10-10.13-10.13.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.13.2 </span>Data Definition</div>

<div data-id="10-10.13" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.13 Authenticator</div>

<div data-id="10-10.14-10.14.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.14.1 </span>General Definition</div>

<div data-id="10-10.14-10.14.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.14.2 </span>Data Definition</div>

<div data-id="10-10.14" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.14 Authentication Key</div>

<div data-id="10-10.15-10.15.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.15.1 </span>General Definition</div>

<div data-id="10-10.15-10.15.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.15.2 </span>Data Definition</div>

<div data-id="10-10.15" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.15 Password</div>

<div data-id="10-10.16-10.16.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.16.1 </span>General Definition</div>

<div data-id="10-10.16-10.16.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.16.2 </span>Data Definition</div>

<div data-id="10-10.17-10.17.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.17.1 </span>General Definition</div>

<div data-id="10-10.17-10.17.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.17.2 </span>Data Definition</div>

<div data-id="10-10.17" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.17 Time Adjust</div>

<div data-id="10-10.18-10.18.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.18.1 </span>General Definition</div>

<div data-id="10-10.18-10.18.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.18.2 </span>Data Definition</div>

<div data-id="10-10.18" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.18 Maximum Demand Reset</div>

<div data-id="10-10.19-10.19.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.19.1 </span>General Definition</div>

<div data-id="10-10.19-10.19.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.19.2 </span>Data Definition</div>

<div data-id="10-10.19" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.19 Free Format Field of <u class='defined-term'>Meter</u> ID</div>

<div data-id="10-10.20-10.20.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.20.1 </span>General Definition</div>

<div data-id="10-10.20-10.20.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">10.20.2 </span>Data Definition</div>

<div data-id="10-10.20" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">10.20 <u class='defined-term'>Code of Practice</u> Six <u class='defined-term'>Identifier</u></div>

<div data-id="10" style="text-align:left"><span lang="en-US">10. </span>Appendix 2a: Data Definitions and Descriptions</div>

<div data-id="11-11.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">11.1 Introduction</div>

<div data-id="11-11.2-11.2.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">11.2.1 </span>Read Selected <u class='defined-term'>Meter</u>s</div>

<div data-id="11-11.2-11.2.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">11.2.2 </span>Password Security</div>

<div data-id="11-11.2-11.2.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">11.2.3 </span>Reads</div>

<div data-id="11-11.2-11.2.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">11.2.4 </span>Writes</div>

<div data-id="11-11.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">11.3 Read Data Block</div>

<div data-id="11-11.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">11.4 Authenticator</div>

<div data-id="11-11.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">11.5 Authentication Key</div>

<div data-id="11-11.6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">11.6 Set Password</div>

<div data-id="11-11.8" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">11.8 Time Adjust</div>

<div data-id="11-11.9" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">11.9 Reset MD</div>

<div data-id="11-11.10" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">11.10 Free Format Field of <u class='defined-term'>Meter</u> ID (ppp)</div>

<div data-id="11-11.11" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">11.11 <u class='defined-term'>Code of Practice</u> Six <u class='defined-term'>Identifier</u></div>

<div data-id="11" style="text-align:left"><span lang="en-US">11. </span>Appendix 2b: Transport Protocol and Examples</div>

<div data-id="12-12.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">12.1 Authentication Overview</div>

<div data-id="12-12.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in">12.2 Authentication Process</div>

<div data-id="12" style="text-align:left"><span lang="en-US">12. </span>Appendix 3: Authentication</div>

<div data-id="13" style="text-align:left"><span lang="en-US">13. </span>Appendix 4: Authenticator Calculation</div>

<div data-id="14" style="text-align:left"><span lang="en-US">14. </span>Appendix 5: Multi-rate Register Switching Regime</div>

<div data-id="15" style="text-align:left"><span lang="en-US">15. </span>Annex: Use of <u class='defined-term'>Code of Practice</u> Six in CVA Settlements</div>

CONTENTS

Code of Practice 6: The Metering of Energy Imports via Low Voltage Circuits Fused at 100 AMPS or Less per Phase for Settlement Purposes V4.20