This document contains the principles that underpin the architecture of the BSC's set of Code Subsidiary Documents (CSDs). It sets out principles about the content of each type of CSD and about changing/creating CSDs.

<div data-id="1-1.1" style="text-align:left">1.1 Purpose</div>

<div data-id="1-1.2" style="text-align:left">1.2 Changes to this Document</div>

<div data-id="1-1.3" style="text-align:left">1.3 Coverage of <u class='defined-term'>Code Subsidiary Document</u>s</div>

<div data-id="1-1.4" style="text-align:left">1.4 Modification and Creation of <u class='defined-term'>Code Subsidiary Document</u>s</div>

<div data-id="1-1.5" style="text-align:left">1.5 List of Acronyms</div>

<div data-id="1" style="text-align:left">1. General</div>

<div data-id="2-2.1" style="text-align:left">2.1 General Principles regarding Style and Content</div>

<div data-id="2-2.2" style="text-align:left">2.2 Categories of Configurable Items</div>

<div data-id="2" style="text-align:left">2. General Structure of CSDs</div>

<div data-id="3-3.1" style="text-align:left">3.1 <u class='defined-term'>BSC Procedure</u>s (BSCPs)</div>

<div data-id="3-3.2" style="text-align:left">3.2 <u class='defined-term'>Party Service Line</u> (PSL)</div>

<div data-id="3-3.3" style="text-align:left">3.3 <u class='defined-term'>Code</u>s of Practice (CoPs)</div>

<div data-id="3-3.4" style="text-align:left">3.4 <u class='defined-term'>Data Catalogue</u>s</div>

<div data-id="3-3.5" style="text-align:left">3.5 <u class='defined-term'>Communication Requirements Document</u></div>

<div data-id="3-3.6" style="text-align:left">3.6 The <u class='defined-term'>Reporting Catalogue</u></div>

<div data-id="3-3.7" style="text-align:left">3.7 <u class='defined-term'>BSC Service Description</u>s</div>

<div data-id="3-3.8" style="text-align:left">3.8 <u class='defined-term'>Load Flow Model</u> (LFM) Specification</div>

<div data-id="3" style="text-align:left">3 Contents of Configurable Item types</div>

CONTENTS

Code Subsidiary Documents Architectural Principles V8.0