58.0

<div data-id="annex-x-2-1-1.1" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">1.1 Introduction</div>

<div data-id="annex-x-2-1-1.2" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">1.2 Use of Mathematical Operators</div>

<div data-id="annex-x-2-1" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">1. GENERAL</div>

<div data-id="annex-x-2-2-2.1" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">2.1 Introduction</div>

<div data-id="annex-x-2-2-2.2" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">2.2 Use of Subscripts and Other Expressions</div>

<div data-id="annex-x-2-2-2.3" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">2.3 Glossary of Terms</div>

<div data-id="annex-x-2-2-2.4" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">2.4 Sign Convention - Active Energy and Active Power</div>

<div data-id="annex-x-2-2-2.5" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">2.5 Sign Convention - Cashflows</div>

<div data-id="annex-x-2-2-2.6" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">2.6 Use of Summations</div>

<div data-id="annex-x-2-2" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">2. TECHNICAL TERMS AND INTERPRETATION APPLYING EXCEPT IN RELATION TO SECTION S</div>

<div data-id="annex-x-2-3-3.1" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">3.1 Introduction</div>

<div data-id="annex-x-2-3-3.2" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">3.2 Use of Subscripts and Other Expressions</div>

<div data-id="annex-x-2-3-3.3" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">3.3 Use of Summations</div>

<div data-id="annex-x-2-3-3.4" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">3.4 Glossary of Terms</div>

<div data-id="annex-x-2-3-3.5" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">3.5 Consumption Component Classes</div>

<div data-id="annex-x-2-3-3.6" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">3.6 Linear Interpolation of Variables</div>

<div data-id="annex-x-2-3-3.7" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">3.7 Sign Convention</div>

<div data-id="annex-x-2-3" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">3. TECHNICAL TERMS AND INTERPRETATION APPLYING IN RELATION TO SECTION S</div>

<div data-id="annex-x-2-4-4.1" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">4.1 Introduction</div>

<div data-id="annex-x-2-4-4.3" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">4.3 Settlement Period Times</div>

<div data-id="annex-x-2-4-4.3A" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">4.3A Quarter Hour Times</div>

<div data-id="annex-x-2-4-4.4" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">4.4 Point Variables</div>

<div data-id="annex-x-2-4-4.5" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">4.5 Interpolation of Values of Point Variables Between Spot Times Supplied</div>

<div data-id="annex-x-2-4-4.6" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">4.6 Evaluation of Period Variables from Supplied and Interpolated Spot Variables</div>

<div data-id="annex-x-2-4" style="margin-left:0.69in;text-align:justify;text-indent:-0.69in">4. TIMING CONVENTIONS</div>

<div data-id="use-of-subscripts-and-superscripts-applying-except-in-relation-to-section-s" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Use of Subscripts and Superscripts Applying Except in Relation to Section S</div>

<div data-id="table-x1-" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Table X–1 –</div>

<div data-id="terms-and-expressions-applying-except-in-relation-to-section-s" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Terms and Expressions Applying Except in Relation to Section S</div>

<div data-id="table-x2-" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Table X–2 –</div>

<div data-id="glossary-of-acronyms-applying-except-in-relation-to-section-s" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Glossary of Acronyms Applying Except In Relation To Section S</div>

<div data-id="table-x-3-" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Table X-3 –</div>

<div data-id="use-of-subscripts-and-superscripts-applying-to-section-s" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Use of Subscripts and Superscripts Applying to Section S</div>

<div data-id="table-x4-" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Table X–4 –</div>

<div data-id="use-of-summations-applying-to-section-s" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Use of Summations Applying to Section S</div>

<div data-id="table-x5-" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Table X–5 –</div>

<div data-id="definitions-applying-to-section-s" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Definitions Applying To Section S</div>

<div data-id="table-x6-" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Table X–6 –</div>

<div data-id="list-of-acronyms-applicable-to-section-s" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">List of Acronyms Applicable to Section S</div>

<div data-id="table-x7-" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Table X–7 –</div>

<div data-id="list-of-valid-consumption-component-classes" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">List of Valid Consumption Component Classes</div>

<div data-id="table-x-8" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Table X-8</div>

<div data-id="table-x9" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">Table X–9</div>

<div data-id="amendment-record--section-x-2" style="margin-left:0.69in;text-indent:-0.69in;text-align: center">AMENDMENT RECORD – SECTION X-2</div>

<div data-id="annex-x-2" style="text-align:center">ANNEX X-2: TECHNICAL GLOSSARY</div>

CONTENTS

BSC Section X-2: Technical Glossary V58.0

Defined Terms

Cross-references