Add clarification to 1.4.11 Non-text contrast understanding about logos acting as user interface components - UIC needs to have *some* sufficiently contrasting aspect

understanding/21/non-text-contrast.html

@@ -410,12 +410,16 @@ <h4>Required for Understanding</h4>
 				<section>
 				<h4>Logos</h4>
 
-				<p>Logos are exempted from contrast requirements, under the assumption that they must comply with stricter color choices mandated
-				by corporate identity or brand guidelines. However, this can be problematic when logos act as <a>user interface components</a>
-				(such as a link or other interactive control). In these cases, as a best practice, authors should consider choosing a variant of
-				the logo that has sufficient contrast, if allowed by the corporate identity or brand guidelines.
-				Alternatively, authors should consider providing an equivalent <a>user interface component</a> which serves the same purpose and meets
-				contrast requirements.</p>
+				<p>Logos are exempted from contrast requirements when they are purely used as
+				<em>graphical objects</em>, under the assumption that they must comply with stricter color choices mandated
+				by corporate identity or brand guidelines. When they act as <a>user interface components</a>
+				(such as links or other interactive controls), authors must nonetheless make sure that there is an aspect of
+				the user interface components that allows users to identify the components.
+				If possible, and if allowed by the relevant corporate identity or brand guidelines, authors should choose a
+				variant of the logo that has sufficient contrast. Alternatively, authors should provide an additional
+				visual element with sufficient contrast that helps identify the user interface component – such as
+				additional text, or an outline or border around the component. Lastly, authors may instead consider providing an
+        equivalent <a>user interface component</a> which serves the same purpose and meets contrast requirements.</p>
 
 				<p>If logos are presented with an insufficient contrast, but their presentation was an author choice rather than
 				being mandated by corporate identity or brand guidelines, then that particular low contrast presentation is