This specification provides a detailed explanation of HHDA instruction processing. Associated with the specification are: Metering System identifiers are associated with a Distribution Business such that it appears to the system that Metering Systems can never change Distribution Businesses; the appointment of PRS Agents is to a Distribution Business and not to a GSP Group; the subject of a refresh of data from a PRS Agent is a Distribution Business; and that instruction file sequence numbers are unique and sequential between source and target.

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

<div data-id="2-2.1-2.1.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.1.1 Relevant Relationship</span></div>

<div data-id="2-2.1-2.1.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.1.2 Relevant Relationship Change</span></div>

<div data-id="2-2.1-2.1.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.1.3 </span>Significant Date</div>

<div data-id="2-2.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span>2.1 Relevant Relationship, Relevant Relationship Change and Significant Date</span></div>

<div data-id="2-2.2-2.2.1" style="text-align:left"><span lang="en-US">2.2.1 </span>“<u class='defined-term'>Data Aggregator</u> Appointment Details” Instruction Type</div>

<div data-id="2-2.2-2.2.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.2.2 </span>“<u class='defined-term'>Data Collector</u> Appointment Details” Instruction Type</div>

<div data-id="2-2.2-2.2.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.2.3 </span>“<u class='defined-term'>Measurement Class</u> in Registration Details” Instruction Type</div>

<div data-id="2-2.2-2.2.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.2.4 </span>“Energisation Status in Registration Details” Instruction Type</div>

<div data-id="2-2.2-2.2.5" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.2.5 </span>“<u class='defined-term'>GSP Group</u> Details” Instruction Type</div>

<div data-id="2-2.2-2.2.6" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.2.6 </span>“<u class='defined-term'>Line Loss Factor Class</u> Details” Instruction Type</div>

<div data-id="2-2.2-2.2.7" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.2.7 </span>PRS Refresh</div>

<div data-id="2-2.2" style="margin-left:0.67in;text-align:left;text-indent:-0.67in"><span>2.2 PRS Instructions</span></div>

<div data-id="2-2.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span>2.3 HH <u class='defined-term'>Data Collector</u> Interface</span></div>

<div data-id="2-2.4-2.4.1" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.4.1 </span>Instruction File Processing</div>

<div data-id="2-2.4-2.4.2" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.4.2 </span>Instruction File Processing - Problem Resolution</div>

<div data-id="2-2.4-2.4.3" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.4.3 </span>Instruction Processing</div>

<div data-id="2-2.4-2.4.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span lang="en-US">2.4.4 </span>Instruction Processing - Problem Resolution</div>

<div data-id="2-2.4" style="margin-left:0.59in;text-align:left;text-indent:-0.59in"><span>2.4 Instruction Life Cycle Processing</span></div>

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

<div data-id="appendix-a--instruction-format" style="text-align:left">APPENDIX A – INSTRUCTION FORMAT</div>

<div data-id="appendix-b---examples-1" style="text-align:left"><span>1</span><span>. New <u class='defined-term'>Metering System</u></span></div>

<div data-id="appendix-b---examples-2" style="text-align:left"><span>2</span><span>. Change of <u class='defined-term'>Line Loss Factor Class</u></span></div>

<div data-id="appendix-b---examples-3" style="text-align:left"><span>3</span><span>. Change of <u class='defined-term'>Supplier</u> and <u class='defined-term'>Data Aggregator</u></span></div>

<div data-id="appendix-b---examples-4" style="text-align:left"><span>4</span><span>. Change of <u class='defined-term'>Supplier</u> with no change of <u class='defined-term'>Data Aggregator</u></span></div>

<div data-id="appendix-b---examples-5" style="text-align:left"><span>5</span><span>. Change of <u class='defined-term'>Data Aggregator</u> with no Change of <u class='defined-term'>Supplier</u></span></div>

<div data-id="appendix-b---examples-6" style="text-align:left"><span>6</span><span>. Correction to Relationship Start Date</span></div>

<div data-id="appendix-b---examples-7" style="text-align:left"><span>7</span><span>. Registration Withdrawn</span></div>

<div data-id="appendix-b---examples-8" style="text-align:left"><span>8</span><span>. Details sent to incorrect <u class='defined-term'>Data Aggregator</u></span></div>

<div data-id="appendix-b---examples" style="text-align:left">APPENDIX B - EXAMPLES</div>

CONTENTS

Half Hourly Instruction Processing Specification V3.0