diff --git a/guidelines/index.html b/guidelines/index.html
index 86b2b3e4..7f001c96 100644
--- a/guidelines/index.html
+++ b/guidelines/index.html
@@ -531,7 +531,7 @@ <h1>Glossary</h1>
 
                 <dt data-include="terms/20/emergency.html" data-include-replace="true"></dt>
 
-            	<dt data-include="terms/21/essential.html" data-include-replace="true"></dt>
+            	<dt data-include="terms/20/essential.html" data-include-replace="true"></dt>
 
                 <dt data-include="terms/20/extended-audio-description.html" data-include-replace="true"></dt>
 
diff --git a/guidelines/sc/21/orientation.html b/guidelines/sc/21/orientation.html
index 9a352953..6790f41a 100644
--- a/guidelines/sc/21/orientation.html
+++ b/guidelines/sc/21/orientation.html
@@ -10,7 +10,8 @@ <h4>Orientation</h4>
    </p>
    					
    <p>Content is not locked to a specific <a>display orientation</a>, and functionality of the content is operable in all display orientations, except where display orientation
-      is <a>essential</a> for use of the content.
-   </p>
+      is <a>essential</a> for use of the content.</p>
    				
+   <p class="note">Examples where a particular display orientation may be essential are a bank check, a piano application, slides for a projector or television, or virtual reality content where binary display orientation is not applicable.</p>
+   					
 </section>
diff --git a/guidelines/terms/21/essential.html b/guidelines/terms/21/essential.html
deleted file mode 100644
index d0fd5113..00000000
--- a/guidelines/terms/21/essential.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<dt class="new"><dfn>essential</dfn></dt>
-<dd class="new">
-   					
-   <p class="change">New</p>
-   					
-   <p>if removed, would fundamentally change the information or functionality of the content,
-      <strong>and</strong> information and functionality cannot be achieved in another way that would conform
-   </p>
-   					
-   <p>Examples of a particular presentation of content being essential to the information
-      being conveyed:
-   </p>
-   					
-   <ul>
-      						
-      <li>Banking site where a check deposit has to be in a certain orientation;</li>
-      						
-      <li>Piano app in landscape mode;</li>
-     
-     <li>Content for apps and devices that do not support the change of display orientation, such as slide presentations to projectors and televisions;</li>
-     
-     <li>Virtual reality and augmented reality content in which landscape and portrait display orientations are not generally applicable in binary fashion.</li>
-      					
-   </ul>
-   				
-</dd>