Add note about UA SHOULD guidance for roles outside of required a11y …

…parent role

index.html

@@ -655,6 +655,7 @@ <h3>Allowed Accessibility Child Roles</h3>
 			<h3>Required Accessibility Parent Role</h3>
 			<p>The required <a>accessibility parent</a> (simplified as "parent") role defines the container where this <a>role</a> is allowed. If a role has a required accessibility parent, authors MUST ensure that an element with the role is an <a>accessibility child</a> of an element with the required accessibility parent role. For example, an element with role <code>listitem</code> is only meaningful when it is a child of an element with role <code>list</code>.</p>
 			<p>To determine whether an element has a parent with the required role, <a>user agents</a> MUST ignore any elements with the role <rref>generic</rref> or <rref>none</rref>.</p>
+			<p>Also, <a>user agents</a> SHOULD ignore the role if it occurs outside the context of a required accessibility parent role. </p>
 			<p class="note">An element with the appropriate <a href="#implicit_semantics">implicit WAI-ARIA semantic</a> fulfills this requirement.</p>
 		</section>
 		<section id="namecalculation">